Make a Rubber Band Sting for Less Than a Penny

It stings a lot and don't aim for the eye.

- paperclip

-rubber band

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)