[lemonade]

This one only cost me the price of a sono tube, a sheet of foam, and pipe insulation. This price suits me better.

 

[lemonade]

I got the idea from another forum member, so of course I don't mind! The end of the cannon is a plastic bowl with a styrofoam ball glued on. The cannon balls are big Christmas balls. The wheel hubs are styrofoam, also, with a dowel rod holding them together. Wheels pull apart for easy storage. I also made a small one ( about 2 feet long) that sits on a non rolling base like a small stair, also made of foamboard.