Alexa and Sinclair-10's Musical Instrument Toys

by leothemakerprince, published

Alexa and Sinclair-10's Musical Instrument Toys by leothemakerprince Dec 12, 2013


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From the book LEO the Maker Prince:

Alexa looked for toys to download for her and her brothers to play with. She decided to make different musical instruments so they could form a band together. There is a rubber band guitar, a percussive shaker, a "woodpecker" knocker and an ocarina.


For the ocarina, the file ocarina_side_split will give you the instrument as pictured in the book. Be sure to clean the hollows out of the main body and mouth piece well. Then glue the two halves together so that they are sealed.

There is also a file for the ocarina with the split through the center (ocarina_split_face) if you prefer that look.

If you have a printer that can print well without support, feel free to contact me for the file of the ocarina without splits.

There are many resources online where you can learn how to play an ocarina, such as: http://www.ocarina.co.uk/how-to-play-ocarinas/

For the rubber band guitar (files rubberbandguitar and pegs_to_print):

  1. Grow the pegs separate from the main body. Clean the support material off all parts.
  2. Get 4 rubber bands and cut them so they are no longer a loop.
  3. Tie a knot at one end of each rubber band and slip the knotted end into the keyhole on the taller edge of the main piece.
  4. Slip the other end of each rubber band into the holes on the shorter platform.
  5. Place the pegs in the holes. The round edge should face inward.
  6. Rotate the pegs down so that they are flat with the platform and lock the rubber bands into place
  7. To tune the guitar, lift each peg one at a time and pull the rubberband to get it tighter and then push the peg back down to set.

For the Shaker Instrument (shaker_pyramid), grow the piece as a hollow shell and pause the machine to fill it with rice or something similar before the top is reached. For the stripes shown in the book, each color is 30% and the black stripes are 5 % each.

There is also a fun egg shape that you can make using the shaker_egg file. It will wobble slightly when put on a surface and nudged.

For the pattern, our total layer count was 414

  • Load purple, Pause at 124
  • Load black, Pause at 145
  • Load Blue, Pause at 269
  • Load black, Pause at 291
  • Load Orange
    End at 414

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Could you describe the woodpecker instrument a little bit?

Also, what sort of notes did you tune the guitar to?

Sure! The Woodpecker is a percussive "noisemaker". It's essentially like a plastic bell that has a sliding cylinder pierced through it. At the end of the cylinder are two solid balls so when you wave it in a back and forth "ringing" motion it knocks repeatedly on the outer sides of the bell shape.

The guitar is designer so that you can string a rubber band through it and tune it to any note based on how taut or loose it is. Due to its small size its sound is not very loud.

hi.i printed the hole ocarina..but i cant get any sound out of it .looks good thou.can u help me out.

How exciting that you have a brand new ocarina! Were you able to print it whole without support? If there is support, make sure it's all cleared out. Otherwise, the key to having the ocarina work is to have the slanted portion under the mouthpiece be free of obstructions. Let me know if any of those help.

For the rubber band guitar, is there a separate file for the little tabs? I'm not seeing them in the file for the guitar itself

Yes! The file for the tabs are called "pegs_to_print" in the thing files. I have been thinking that I should make a different thingiverse page for every one of the instruments as it's a bit confusing and overwhelming. Feel free to offer feedback on how your print goes and what would make your experience better.

Ocarina files are 3DM instead of STL. Is that intentional?

Oops! That's not intentional! Thanks for flagging that. I'm replacing the files now.

Thanks for that! The model has been revised. It was in inches instead of millimeters like the rest.

the ocarina is a bit small.... like only a few millimeters wide small