Step 1: What you'll need
*all pvc is 1/2 inch in diameter*
atleast 2 feet of pvc pipe
1) 2 liter bottle
1) pvc cement
1) electricians tape( or any other type of strong tape, but I like the feel of electricians tape on the handle)
1) pvc ball valve
Step 2: Assembly
Step 3: Have fun!
AA batteries (must be wrapped in duck tape a bit to be perfect fit)
Baby cut carrots
Mini Marshmallows (good for shooting indoors and not destroying anything )
I am not Liable for any injuries that might happen to come about because of this instructable..
and do be safe- don't shoot AA's or marbles at any one... it could really hurt(kill). =p
Here's the video displayed in my animated gif.