Intro: Make a Rubber Band Sting for Less Than a Penny
It stings a lot and don't aim for the eye.
Step 1: Materials
Attach the paper clips (they are around 0.9 cents each). Use 1-10 paperclips on each band.
Only fire with the tip of a pen or the paperclip will hit your finger. (also allows your enemies to hurt themselves when trying to shoot this)