Now for the good stuff :)
This is a fun and easy (and cheap) little toy that I invented the other day. It's very strong and shoots very far.
What you'll need:
1 Office Depot Ballpoint pen - very cheap -- 1 dozen for $0.89
(this might work with other pens, but I haven't tried)
1 Rubber band of medium length
Step 1: Making the Barrel
This is a very easy step, if you can't figure it out, you LOSE. Please try again.