Labyrinth Gift Box

by sneakypoo, published

Labyrinth Gift Box by sneakypoo Dec 11, 2013

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Time for Christmas, time for a less boring package for the cash my nephews will get. Last year it took them all of 5 seconds to get at their cash, hopefully this one will take them a little bit longer. There's only one correct path and I tried to make it so that it's easy to slide past the correct exits, time will tell if it's effective.

As always, please post pictures if you decide to make one. I've spent more hours than I care to count on this one so it's the least you can do dammit ;)

Update: Well, Christmas is over and I'm happy to report that it was the first gift received but the last one opened for the day. One was still closed when I left. I'll call that a success :)

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I would also suggest, like m3henry says, to extend the cavity into the hex area of the bottom part. This would provide almost 15% more volume.

The entire hex area being solid inside is kind of a waste.

Mar 6, 2016 - Modified Mar 6, 2016

It works extremely well and looks great without the slightest rework by hand after printing.
i print both with 100%
Filament: 1.75mm PLA
Printer: Vertex K8400 Kit from Vellemann
I send some photos under *I made one"

btw this item is being sold on ebay

Bottom piece printed great so far at 100% scale, gonna see if the lid at 100% works as well or if I have to bump up to 101%

Jan 11, 2016 - Modified Jan 11, 2016

Tolerances too tight. Plus too small. Up the base x and y to 200%, then up the lid to 201% and it's perfect.

Great idea
good size, perfect tolerances, made on ultimaker 2,
2 pieces printed at once

thanks for sharing

Awesome, thanks for sharing it.
Can you suggest an easiest method to add more nubs to the lid?


Wow! This is brilliant! Christmas eve and now I'm printing these non stop to give out as extra gifts!

(Do you have an 'impossible' version for my niece & nephews? I want to tell them there's money in it, but I'm pretty skint this year!)

Since the two pieces need to be printed separately you can't really make one that is impossible. But if it makes you feel any better I just got home from this years Christmas dinner and my nephew said he gave up on his, found it three months later and gave it another go then :)

Dec 24, 2015 - Modified Dec 24, 2015
JoeyJoe - in reply to sneakypoo

I was thinking of perhaps the start of it has a notch like the end, which makes it feel like it's the wrong path. That would be cruel though!

Printing this at 0.3mm slices, with 30% fill at 100% scale on a Wanhao Duplicator 4, taken roughly 3 hours to print (the core), but looking much better than the others people have printed! Found out how to make multiples at a time on ReplicatorG, so this is going to be running all night!

This is pretty decent, have been thinking you could get this mass produced and sold as a gag gift (buyer puts money or vouchers in it and gives it to the recipient). Would keep anyone amused for hours.

Just finished in wood filled PLA, .25 layer, 1mm shell/top/bottom 50% infill. Too tight to turn without major force, sheared off the pin on first attempt to seat all the way even after sanding the base and reaming out the cap slightly. Going to print new cap at 101% and that should fix it. Going to try and stain the wood PLA for an old artifact kind of effect. I'll post pics when I get it done and working good with all the details.

I agree, the lid is just "..." that much too tight. But it's easy to fix at a .01% change in x/y size.

This is brilliant. Thank you. Just finished printing one up and it fits perfectly. Now to get the lid off so I can put something in it for my puzzle loving daughter (in testing it out, I managed to get the lid half on before I lost my place lol)

This thing is awesome! Thanks a lot. I've made a couple and am putting my nephews Christmas present in them (money).

I printed it on the new MOD-t in PLA. 0.2 layer, 0.8 shell, 0.8 top/bottom, 10% infill. I had to scale the bottom part in order for them to fit together. I scaled 98% and they slide together wonderfully! Thanks again!

Amazing work :)

This is fun to give to people :)

You should make a new version where the track is on the inside, being able to see the track helps a lot :)

Thank you so much for this design ! Printed it in 0.25 mm layers height, 0.8 scale and it works perfectly !

Awesome! Your model has been featured as one of the Top 3D Printed Christmas / Holiday Models this year. Search "Top Free 3D Printed Christmas Gift 2015 Printing Ninja" to see. (sorry thingiverse bans url addresses)

Two thumbs up

Coolest thing I've ever printed. Nice job!

Very cool device. Printed it in ABS and it works but it is pretty tight. Extremely difficult to solve, congratulations on making it complex enoough. This will drive the boys nuts but I have to loosen the tracks just a bit. Maybe will try the dremel on it. Great design thanks.

A great design!

However I would suggest the internal cavity was made slightly deeper so that it extends into the hex area. there's no need to make that area solid.

It printed very nicely! Thanks.

Thank you for sharing this. I printed one (The first of many I am sure) and I love it. Great work, thanks again

This is toy from hell :D i don't know how open it :D

I had to run the files through the MS Model repair, but after that it printed perfectly.

Spent 5:35 hours printing and now cant solve it.

Great desighn quality. Everything prints and works perfect! Printed 0,2mm layer, 10% infill.

Apr 30, 2015 - Modified Apr 30, 2015

Printed this out, laid it out as a geocache. After 4 visits it started to be "easy" to cheat. The pin is chipped away so it can just be dragged out. Gonna insert a metal pin with some glue and a dremel to make it more durable.

Narg - in reply to TJWeb

Award for ingenuity!

Printing now, looking forward to the challenge and frustration of friends to try, thank you CJR uk.

Has anyone customized one of these with a loop on the end? I want to be able to carry it around on my backpack.

If you still need it here you go. https://www.thingiverse.com/thing:951338

Labyrinth Gift Box from sneakypoo

Printed the "Labyrinth" at 0.1mm layer height 40mm/s speed and 20% infill, black pla 220c 50 on hotbed. Printed prefect. Now the "lid". This is a awesome small fun gadget! And i know the perfect place for it ;)

printing this right now...... UP Plus 2 ABS.....
1.25 hrs for the base.

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Sneakypoo, do you have Paypal? I want to buy you a beer as I printed your design often.
Please mail me: funbart at gmail

Awesome!!!!!! This printed perfectly on my Makerbot Replicator 1 Dual using MakerBot Desktop's PLA STANDARD Resolution settings.

I like how, even though I printed it for someone else, assembling it was a puzzle in itself! The size of this thing is too perfect.

I think this is the most exciting design I've seen on Thingiverse, and has the most reusability! I will be printing this for all my friends...

I am using a Replicator 5th generation and when I try to print both parts it starts to get stuck to the extruder and it unravels I tried diffrent tactics and it will not work. Can anyone help?

Sell your 5th generation ?

yeah right! like that's going to happen.

Yeah, do it. There's much better printers on the market today.....

Attempted to print. Got the maze part done (bottom). It worked great. Nice print, first time. However, I'm having trouble printing the lid part. I've tried three times and each time it starts to do the "unraveling" spider web thing about a third of the way through the job. I have not been able to get a successful print yet of the lid. I'm using a MakerBot Replicator 2 that's about a year old and standard PLA. Is anyone lese having this issue? Thanks in advance.

Just wanted to way in, I don't have a MakerBot, but a printrbot. I haven't had any issues of it doing that. Have you tried using different PLA plastic (new spool)?

Ugh, I'm having the same exact issue, same printer and everything. Printer suddenly decided it will spider web/unravel instead of print about 30% up. Let me know if you figure out how to fix it.
Replicator 2 1yr old, purple standard PLA
failed to print Lid at Low resolution, .3mm layers, supports

Bad printer. Time to get a new better one....

i am printing right now, had some errors with it not being manifold, but i fixed it and i will try to post the fixed model

This thing is so awsome!! It works perfectly!!!

I think I'll make one.

This is an awesome box! I have printed it once and it's subject to a new competition in our family: How fast to assemble and disassemble it.

My daughter has a record of 15 seconds! Beat that losers!

Check the video out!

Now printing 6 boxes at once. I will upload the pics for "I made one" when it's ready.

we are not losers funbart.

We all are until we beat that 11 seconds, coxkids4 ;-)

a video or it didn't happen ;-)

its called faith cant you believe me? I am sorry but I cant ma... wait my 3ds can take videos and it has a SD card.
I get it made as soon as possible.

If you say you did it, I believe you! Congratulations! You are the winner. we are losers!!!

no such thing a losers. :)

we are founus.

Well, I could... but I have a policy of not beating little girls :D

Do I hear chicken sounds coming from Sweden?
Buk, buk, buk, buuuuuk, buk buk...... ;-)

Oooh, it's like that huh? Well then, take this! Opened AND closed in 15 seconds. Your turn funbart's daughter! ;)

Sneakypoo, do you have Paypal? I want to buy you a beer as I printed your design often.
Please mail me: funbart at gmail

She said: "old people are soooo much slower than young people, so please don't cry, you can't help it".

Give it up sneakypoo. You can't beat that 11 seconds record. You are still a great designer though ;-)


C'mon, I'm not THAT old. Wait... I hear old people should get respect from young people so yeah, I'm old! ;)

I'll have to practice a bit and try again ;)

Hey sneakypoo, is this copyrighted? I would like to use and distribute it.

Copyright information is on the right hand side for every design on Thingiverse. If you want to work out some sort of deal, contact me privately.

Having the labyrinth engraved inside the lid and the pin on the other part would be the ultimate evil. :D

Dec 31, 2014 - Modified Dec 31, 2014

I printed this at 0.4mm resolution on a Printrbot. It needed a little sanding post-print but it works well. If you print the inner piece as is and the outer piece at 102% you shouldn't need any sanding. Also, it gets a little tipsy once the height exceeds 2" so I had to employ a 10mm brim and extra tape to keep it steady.

Printed in PLA on a Makerbot Rep2. Took about 2hr for each part, printing at 40mm/s.
Came out perfect at 0.2mm layer heights, 0.3mm layer height would cause it to be too tight.
The maze path is really well done, I can tell a lot of thought went in to designing it. If your just jiggling it around with no thought it is easy to miss a turn and get lost in a dead end. The long straight at the start is nice for the people that pick it up for the first time to see kinda how it works.

Dec 23, 2014 - Modified Dec 23, 2014

This is a great design! I print them at 86% for the lid, and 85% for the base, and they are just big enough to hold US currency. I have created a customizable version of the lid - http://www.thingiverse.com/thing:605933

Customizable Labyrinth Gift Box Lid with Text

Thanks man, I was trying to get it done in FreeCAD but my fu isn't strong enough.

Hi this thing is fabulous, it was a great gift!

It would be awesome if I could add the name of the recipient on the lid, however. Can you post a modifiable file of the lid?

I made two with my Printrbot Simple Metal. The lid is a little tight, but usable without scaling.

I get a manifold error when I slice the files with slic3r. Does anyone else have this problem? Did you repair it or just print as is?

Lid was a bit to small on my Prusa I3, but I scaled it to 102% And it worked like a charm!

I printed this at 100% scale in my AIO Robotics ZEUS and it come out perfectly! We have an office holiday gift exchange party and I'm going to use this to house my gift (actually a reference to it). Should be great fun! Thanks to the OP for sharing this with us!

Congrats! I thought you model was one of the best choices for a 3D Printed Christmas gift! I made a link from here: http://3dprintingninja.blogspot.com/2014/12/top-20-free-3d-printed-christmas-gifts.html

What units is this measured in?mm, inches, cm, etc?

Lots of talk about printing out cheat-sheets for varying purposes, has anybody actually created one? I have what I think is a pretty neat idea for a gift exchange, but it relies on having a key.

A bit about my idea: It involves putting the solution on a homemade scratch-off ticket, with a penalty/tradeoff for anyone who chooses to scratch off the solution rather than solve it on their own.

I had some last year, but given the spirit of this thing didn't publish them. There's several methods for making a "cheat sheat" posted in this page if you really want to, not too difficult.

Printrbot Simple (2014 DIY edition) here. At first scaled both pieces to 90% to fit in printable area, but they were up too tight and wouldn't work. Ended up with 90% for inner piece and 92% for lid and they fit perfectly.

Love this thingy, thank you!

Evil little box, I gotta build a bunch of these for Xmas in different color combinations!

Took 16.5 hours on a Solidoodle SD4 to print both pieces simultaineously, used about 44 gm of material, so $2-3

I want to use these for $USD so I could print at 87%, but I'm not sure how much I'd save (other than a couple of hours per set)

Many Thanks for making this available!

Printed this earlier, worked amazing, bravo!

Printed the inner piece 102% scaled. A bit loose. I guess my bot is well calibrated. Nice make indeed. Cheers for the designer!

if you print in default settings it will be very tight so use these settings
infill 10%
inside piece 100% size
outer piece 102% size

That depends on your printer. I've been meaning to add a tighter version because if you print this on a well calibrated machine the fit will actually be a bit too loose.

+1 on this, at 100% it works like a charm and there is still enough play, so it could be even tighter.

Just improve your 3d-printing skills :-p (or get a better printer, like say, an ultimaker-like)

great thing! Had anyone else the problem that the honeycomb of the inner part wasnt printed correctly? I printed it on my K8200 with ABS and the honeycomb looked like some layer were not completly printed.

Oct 13, 2014 - Modified Oct 13, 2014

Making one on my Simple. Was nervous about fitting vertically, so scaled inside 75% and outside 77% (based on some comments below). Works well - if a bit sloppy. Printing new lid at 75%.

10% infill, 3 layers/loops, .29mm layer height.
A little over an hour per piece to print (free KISSlicer doesn't allow multiple models to be sliced together).

Oct 10, 2014 - Modified Oct 10, 2014

Made with a CubePro, scaling the life to 101%. Perfect fit. Took about 5 hours at 200microns. Great little thing!

Initially it was too tight, printed with a Davinci 2.0 duo, but changing the lid to 102% scale and the base to a 100% scale, and it works flawlessly, albeit not quite the same thickness when closed. Well within the tolerances I had for it. ^^

.2 or .3 layer thickness
30% Infill
Standard Speed
2 - 4 hour build time.

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Just do a little sand will help, I printed with my 1.0 without change scale, and fits pretty well

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Oct 9, 2014 - Modified Oct 9, 2014

Printed both sides today, but they were extremely tight. I tried sanding slightly and playing with it to loosen it up, but broke the maze notch on the case. Its almost the right size now, but I think i'll replace the guide with a small screw and see how that goes.

This was one of my first prints though, so don't take that as a complaint.

printed this on low res works great using the replicator 2

this thing is awesome great job

Hey could you email me steps. [email protected]

Awesome! I printed it with normal Makerbot 2(5th Generation) settings(no raft) with an airhole on the top for air pressure and it turned out great! It was really easy though. I beat it in 15 seconds.

Second time though? It took me 10 seconds.(I timed myself.)

Im going to increase the scale of this, and use it for geocaching :D

Need to size it for putting a 25ml bottle of sloe gin in.
If I get the calculations right it'll end up a lot wider but not much longer. And should still work.
I'll post it, if I can get it right.

But briliant design - it's definitely going to feature prominantly in my christmas gifts this year :-)

Made both pieces out of PLA; after a half hour of my kids playing with it they rubbed down the nub on the lid to be flat. Love the idea; will retry with an ABS lid.

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I used cura to print this and it worked fine. First you should disable support, this thing was designed to not need any. Maybe the file got corrupted when you downloaded it? I just tried downloading the file and slicing it in cura and in the layer view it looks like it will print just fine.

Oct 3, 2014 - Modified Oct 3, 2014
jkister - in reply to sneakypoo

i re-downloaded & disabled support - same error. I loaded the gcode in gcode.ws and see the error there too - right at layer 844 @ 15.21mm Z - it just starts printing inside the hexagon with nothing underneath it (not at all blaming this STL - its gotta be something i'm doing wrong or some evil setting i have). In Cura layer view, I can see how the hexagon base is separated from the inside cylinder -- http://i.imgur.com/NLEXrlG.png

It was an evil setting In cura. I reset the profile to default and keyed in the appropriate values for my bot. now it looks like it'll print fine - sorry for the noise!

thanks and sorry for posting so much, but how long did it take you to make yours and what were the specifications of yours. I'm new to this so please be nice to the NooB.

It takes me about 10 hours to print both pieces. 20% infill and 0.1 mm layer thickness. I forget my print speed. You can use 0.2 mm layer thickness to just about cut the print time in half and have very little degradation in quality.

Depending on printer speed and settings anywhere from 2.5 hrs to 10 hrs.
2.5 hrs is on our Replicator 2 - 10% infill, 2 shells, .3mm layers.

About how long will it take to make one of these things anyway? because the college i go to we have to earn time to use the 3d printer and i have a good bit and i want to make this.

No need to post multiple times. The reason you didn't get any replies is probably because there is no single answer (and it's only been a couple of hours). It depends on your printer, what speed you print at, layer height, infill and so on. Sit down with the software and try slicing it to see how long it will take under your conditions.

Congratulations on getting featured! I've made so many of these.

Thanks :) And happy to hear you're enjoying it.

how long does this take to make you think?

Oct 2, 2014 - Modified Oct 2, 2014

Printed one last night, .4 nozzle, .2 layer height on printrbot simple metal. with superb results. it looks and works amazing. I remembered how much i hated these puzzles, I suck at them! ha

I've made a few of these now, with varying results. The ones that work are very fun.

I want to print the inner part in 2 colors, so that the track is a bit more stand-out obvious. But importing the STL into FreeCAD leaves me unable to boolean out a cylinder from the middle.

Have any other file formats around still?

Oct 2, 2014 - Modified Oct 2, 2014
rhmorrison - in reply to xienwolf

When you import an STL file in FreeCAD you have to create a mesh from the STL object and then make it a solid.
Only then can you perform boolean operations with the object,

Printed on Rostock Delta at 0.3 mm nozzle and 0.2 layer height.
Perfect fit at 100% size.
Very fun idea, thanks a lot!

Just made on last night. Layer thickness 0.2. With my lousy printer, the parts ended up too tight.
After sanding both parts quite a bit, it worked out awesome!
Planning to make a few more!

may i ask what "lousy" printer you are using?

I printed six of these last night and they're great. May I suggest putting a small hole in the cap to let air out, though? It gets hard to move around when it's closed due to air pressure.

This is a fantastic idea. I have some ideas that I would like to explore in taking this to the next level. Can you share what technique you used to carve out the 'lines' on the bottom box? Thanks.

Robert you are an evil man. Very very evil. This gift box is way to hard for kids. I had to hack it and hold bright light source beneath the box so I can see the labyrinth :)

Really? It was easy for me.

So yea, I guess your suppose to print the top bigger? HA, It took a hammer to get it sealed. Getting it open will take a torch since it doesnt twist at all!!! So looks like that $100 bill aint going nowwhere. Which brings up an idea. Why not put a slit on top so you can put cash inside for the impossible ones to open?

Not sure what made you think using a hammer was a good idea... actually I'm not sure how that helped at all since the last step to close it is to twist, not push. And no, the top isn't made to be printed bigger, there's plenty of clearance if your printer is tuned properly (mine actually rattles when closed). But yeah, you can print the top bigger to compensate.

Printed the maze scaled to 50%, and the lid at 51%. Turned out great, but it's not hard to force the lid off, skipping over the maze. That might not be an issue when printed full size. I plan to try a modified version, still at half scale, but with slightly thicker walls on the lid, in hopes of making it a little bit stronger.

I printed this at 1:1 scale in PLA on a Printrbot LC v2...worked perfectly. Sliced with Kisslicer Pro at 0.25mm/layer and 20% infill. Currently printing a second one in a different colour and will use for gifts for my nephews.

Any chance you could post a mirrored inner piece?

This printed PERFECTLY on my UP! Mini... 1:1 scale. Jeez is this puzzle a bitch, it took me 20 minutes before I came back here to check where I was in the puzzle... Deffinitely going to get a few of these away as gifts

Printed with my new Kossel Clear last night. Used Repetier Host with slic3r and it was perfect. I'll have to post a picture at some point but wow, really nice print and since I infilled at 60% really strong too.

I'm getting slic3r errors like overlapping / self-intersecting facets - the slice looks good but has anyone else received errors and it printed fine?

Works great. Prints fine without any type of support at 100%. Good job!

I made the mistake of locking it partially (to see how it worked) before putting an item inside. Now I'm stuck. :P

These caused high frustration on opening day. Only one recipient managed to open theirs unassisted, so far as I know.


I swear I'm not a bad man but hearing that pleases me greatly :D Tell them "merry" christmas from me ;)

As for my recipients, one kid got it open eventually but it took a good long while. This was the first gift they got and they started opening it while getting the rest. They eventually gave up, opened the other gifts and then got back on this one. The other kid gave up for the night, it was still closed when I left hehe.

I would like to see the maze on the inside of the lid with the nipple on the outside of the base. How evil am I?

I printed one at 65% size (unfortunately as a last minute christmas gift), but it is so tight that i couldn't close it.
I tried to sand it a little bit, but now it's half way closed and bonded together. You can't move it anymore :(

My plan now is to scale each part slightly differently, I will scale the lid slightly smaller than the base. This will require a bit of experimentation though to get the proper difference in scales. In your case, the lid has to be slightly larger, but again, a bit of experimentation required. :)

I think the complete opposite thing happened to me. In my case, I scaled it up to 125% and now the lid is too loose. My scaling up means the gap between the base and lid also increase proportionately, and in your case, scaling down means your gap has also decreased proportionately. I guess the lesson here is don't mess around with a good design, he he he. That is, unless you know what your doing, which I obviously didn't. :P

Scaling parts that have to fit together with a specific clearance like this is tricky. If you scale it up by 150%, it also scales the gap between the two parts up by 150%, so it's too lose. And in the other direction, if you scale down by 50%, the gap is 50% as side, and it might be too tight. You'd have to do some math to work out exact percentages, but I'd suggest scaling the outer part slightly less than the inner part so that the clearance between the two is constant.

Or you could use one of the parametric designs for this that have been here on Thingiverse, like http://www.thingiverse.com/thing:6004/ from 2011, and use it to generate exactly the size that you want.

A-Mazing Box Detour

Sorry, but like I said in an earlier comment it's hard to please everyone. But considering this has been downloaded by a few hundred people and only a couple of people have reported issues I think it's safe to say it works for the vast majority.

At 65% size you still have just shy of 0.2mm of clearance between the parts which by my standards is perfectly fine. What you could do is print the lid ever so slightly larger to give yourself more space.

Great job with this puzzle box! Printed one scaled up to 125% (still wasn't big enough for what I wanted to put in it as a gift!), PLA, 100 microns, 15% infill. The problem I have is that when I put the lid on, it actually is too loose, it wiggles and rattles quite significantly. I'm thinking of scaling down the lid ever so slightly to make it fit better, I'm just worried that the outer cosmetic shell of the two parts might not line up perfectly, might be able to notice a slight step. I'll try it out anyways. Great job! Has anyone tried to make it just wider (scaling it in X and Y, not in Z)?

Thanks. Yes there is a bit of wiggle room when it's closed. I decided to make the tolerances quite forgiving when I uploaded it. And even with that there was one guy that had issues with it. It's hard to please everyone :) And since you scaled it the tolerances will of course be even greater.

If you just scale it in X-Y I imagine the overhangs will become hard to manage... :)

I made a bunch of these as "gifts" for people I chose to torment. It's important to give a key as well - i print a 50% size version with the correct track in pen as a kindness. https://www.dropbox.com/s/a44slcl9elrklyh/Photo%20Dec%2022%2C%204%2003%2050%20PM.jpghttps://www.dropbox.com/s/a44s...

Hi could you share that picture with me. It doesnt seem to work now. Thanks!

Looks really nice. For those who want to make their own maze, there is a project called 'Mazebox' here on thingiverse, where you add your own puzzle to an scad-file.. kinda tricky to make it work, but it exists..

How did you make this? is there a SCAD?

I think it'd be neat to make this parametric. You could make alternate mazes.

It was done in SolidWorks, no easy way to make it parametric I'm afraid.

Managed to hack up a blank one in blender, working on the generator!

My question is how hard is it to hide something in it? ..printed properly of coarse?.........

Well, it's easier to close than it is to open -- once it's closed you can't even see most of the maze. In closing, you can at least plan ahead.

So... I was just thinking that someone could make a cheat sheet for it really easily by wrapping a sheet of printer paper around it and doing the old crayon-rubbing method. Hope this helps :-)

Ha, I would have to be able to open it again first ;-)

You can also just open it in your favorite 3d modeling program, do a side orthogonal view, and take snapshots every 30 degrees, crop to a narrow section, and assemble in a panorama. Lazy man's virtual 3d scanner.

What makes this maze REALLY evil is that you can't even see the dot once it's started.

This Box is great! Any chance to get an unwrapped image of the maze as a cheat-sheet?

Where's the fun in that? ;) I might add one later but for now I'm enjoying hearing people are having trouble with it, that was the goal.

Hehe, you are absolutely right :-) I think about a cheatsheet not for opening, just for making it easier for the people to close it and letting their friends solve the labyrinth

I printed it and I'm having trouble putting it together. Theyre such a tight fit its impossible to put together. Your printer must be better than mine or something. I printed in PLA.

I am going to bet you used Slic3r? It always makes holes too small.

There's 0.3mm of clearance between the parts, that's a combined 0.6 of wiggle room. By comparison a common nozzle size is 0.4mm. I think you need to tune up your printer if it can't keep up with that amount of clearance. I actually increased the clearance for this one, I often use 0.2mm.

This is a devious puzzle. I have the other one as well and it's easy but I had to cheat to open this one by looking at the 3D model to see where to go.

I am now printing on at 60% size, will post photos when done.

Your frustration sustains me :D

pretty good pattern did you print one out you need one let me know thy have the other one like this one but just a nut maze and a pattern on a bolt i was about to etrude the bolt to make it bigger longer but you save me time nice

Not quite following your post... Did I print one? Well, obviously, there's two of them right there in the picture.