I wanted to make a pink snail for the game. It can hold three pennies, which is a requirement of the game.

These are the slots for the pennies. I had to measure a penny in millimeters and then make the holes a little bit bigger. The penny was 20mm wide, so the holes are 21mm wide.

The object needed to be flat on bottom so that the printer could build it without problems.

I used spheres and then turned them into "holes" so that it would cut out the eye socket shape. The nose was the opposite (solid sphere).