Potatoes Just cut a thick slice of a potato and push it against the barrel, it will cut it perfectly. Also makes a nice wadding for shooting other things!
Smoke Bombs Put the smoke bomb in the back of a potato. Take the fuse and put gasoline on it. Then push the potato down into the gun. It a good idea to shorten the fuse so the smoke starts quick. Shoot as soon as the smoke starts coming out and it looks like a tracer.
Model Rocket Engines Take the fuse and soak it in gasoline. If you can get it to work this has to be the coolest thing your can shoot out of a potato gun. Sucks when it goes off in the gun and smells terrible.
Glow Sticks Looks like military tracer rounds! Try cutting off the end and shooting. Gently drop them in the barrel after your potato with the cut end off. Fire it at night and watch the glowing cloud!
Spudrok's A Spudrok's is a plastic kinetic rocket usually shot out of a potato gun or similar device using a reusable Plastic Pressure Piston (wad). It's designed to have a "glow stick" attached to the nose and is best shot at night. Both the Spudrok's and the WAD are reusable and will last many repeated uses.
Water Put in a spud and pour some water down the barrel. Makes a huge cloud of water DONT USE WITH A COMBUSTABLE TYPE GUN, i have heard that it could explode in a compustible type gun so use a pneumatic.
walnuts make sure to find a decent round one, use a wadding with this one.
broken cd ,break up a old cd and put it in front of a potato and watch out!
rocks same as broken cd
PEARS same as potato but goes farther
BUTANE CAN!! wrap in duck tape and shoot at something hard be careful of flying metal it will explode.
WADDING: i use one of those "rags in a box" and shove 2 of them in before i put the ammo in such as small rocks or other small objects.