Coin Traps

Coin Traps

This is one of my favorites. The coin is too big to be removed through any of the holes, so anyone you show this to who isn’t familiar with 3D printing won’t be able to figure out how you got the coins in there. The trick is to print it half way, pause the print and drop the coin in, then finish the print.

The model can be found here: http://www.thingiverse.com/thing:193941 (model credit: mathgrrl)