A device for holding open the pages in big books with your thumb while you read them.
A coworker saw something similar in one of those 'crazy product designs from Japan' articles. She asked if I could print her one based solely on the low res photo she showed me.
It's a fairly simple design so I quickly drew the 2D outline in Illustrator then proceeded to use a very convoluted process to ultimately get it into OpenSCAD using a number of techniques I'm still learning.
I'm sure there is a much easier method to build the model so please feel free to share any tips.
UPDATE: Of course after I post this, I discover that it's not the first...not having any terminology to go by, I was looking for the wrong thing. Looks like this was here first: http://www.thingiverse.com/thing:1120 and this is newer and closer to my design: http://www.thingiverse.com/thing:1747
It will likely need to be scaled depending on the size of your thumb. The STL file is set to fit my adult male thumb but it's probably thicker than it needs to be...you may need/want to scale it depending on your thumb size.
Printed in ABS on a Thing-O-Matic, heated build platform at 25% infill, 0 extra shells.