thats a nice idea

Hungry Hungry Hippo Balls are great for ammo. They are supplied in the hundreds in the game. While they are about the same size as marbles they are alot lighter and are great for shooting out of 3/4'' or 1'' PVC pipes. If you have an old Hungry Hungry Hippos game you can get lots of ammo and even us...

This cannon is awesome. I especially like the see through combustion chamber.

I always use air freshener or butane gas for fule in my cannons. There both really cheap, you can get alot of them at a 99cent store.

You can always stick a small feather in the back of the earaser to act as a stabilizer, there will be less chance of missing your target. It is also wise to where safety gear, especially when your firing sharp objects.

This cannon is very dangerous looking, but I guess it's safe as long as it can take the pressure. Have you ever found the pumpkins/grapefruits that you fired?

Neat, very cool pneumatic. It would be awesome if you had a stand for it, you know, one with hinges so you can change its firing angle. 8)

Although copper pipes are easy to solder together and redily availible, I find that PVC pipes are the way to go. If a PVC cannon were to malfunction and explode right next to you, you will probubly not be to seriosly injured, however if a copper cannon were to exploded, it will throw shrapnel and mo...