this can fire anything small/circular INCREDEBLY fast.
Step 1: Materials
Step 2: Step 2
cut balloon in half
Step 3: Step 2
Step 4: Step 3
place balloon on the end of the tube
Step 5: Step 4
duct tape balloon to the tube- and now your DONE!
put a small circular object in there, pull, and FIRE
Step 6: WARNINGS
DO NOT AIM AT PEOPLE, ANIMALS, OR BABIES- IT HURTS