Step 1: Materials
You will need a water bottle(any kind will do), ballon(I didn't have one so I used a plastic glove though a ballon is better), rubber band(any size will do), and a sharp stick or anything really as shown. You can shoot any thing with a ballon and only a stick with a glove.
Step 2: Cut Water Bottle
Use a knife or scissors to cut the top part
Step 3: Cut Ballon
Cut end off of ballon.
Step 4: Put Ballon in Bottle
And then spread the ballon top over the bottle top. Then put rubber band on
Step 5: Load and FIRE!!!!!!!
Put projectile in, pull, and then fire.i also added the result in the wall when I used a ballon vs. glove. You can't see too much difference, because it is felt.