These 3D printed coin traps are some of my favorite prints. The coin is too big to be removed through any of the holes, so anyone unfamiliar with 3D printing won’t be able to figure out how you got the coins in there. The trick is to print it halfway, 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)
More 3D Universe blog posts:
Check out the iPhone 5 Case with Moving Gears and Geneva Mechanism HERE…
The Treefrog Layer Height Comparison post can be found HERE…
