It is a very simple gun that can shoot bb's ,airsoft bb's, ball berings ect.
It is acually pritty acurate when you get the hang of it, and it is much more powerfull than my airsoft gun.
Materials:
Tape
15" Balloon
1-1/4" X 3" PVC

Cut off the neck of the balloon and put it on the pvc make sure there are no sharpe edges becouse they will rip the balloon.

Now just tape the balloon on and your ready to go!

Just drop the bb down the barrel into the balloon, strech it back, and let-r-rip.
It also works great for shooting pee's and baby caretts at lunch
