Combine 3d printing and PVC pipes for a catapult that's quicker to print and stronger than just 3d printing alone. Watch the Youtube for building tips. You will need one inch PVC Pipe: two 30 inch, six 15 inch and a giant rubber band!

Note: hand is remix of "creepy reaching hand" from Thingiverse https://www.thingiverse.com/thing:1524972