Spitball Launcher
This is the instructions for an extremely simple spitball launcher. All it takes is a mechanical pencil. (The guitar pick in the pictures was just something so my camera would focus.)
Disassembling the Pencil
Take the pencil apart. Simple.
Making the Launcher
Take the internal piece and the tube. If you have to cut the end off to make it a perfect tube, do it. Then put the internal piece in the tube.
How to Shoot
To shoot, put a spitball in the far end, and pull the internal piece about halfway out. Then flick it or push it forward.