Materials: soda bottle top, balloon, rubber band, bb's.
1. Take the soda bottle and cut off the top part of it.
2. Wrap the balloon around the top of the soda bottle and secure it on with a rubber band.
3. Fill the balloon with bb'(s) and pull it back.
4. Release and watch the bb's go flying.
Check out my YouTube channel for this and other tutorials: http://www.youtube.com/user/vistigioful/videos?view=0&flow=grid&sort=da.