Functional Mini Catapult

This tiny catapult is intended to shoot small metal balls (1cm diameter) as far as possible - using nothing but the printed material.

Read more about what this is for and how it works here:
http://steppschuh.net/blog/?p=1039

This thing was made with Tinkercad. Edit it online: https://www.tinkercad.com/things/huhxMgPkC7K