This is my son William. He has C.P. He wanted a tank costume. I made this tank out of plywood and some conveyor line for tracks. The barrel is made out of PVC pipe and shoots using air pressure. The air comes from a car type air compressor hooked to the battery on the wheelchair. The cost of this project was:

Pipe 50.00 $ Plywood 11.00 $ Compressor 15.00 $ 1x2x8 6.00 $ Paint 8.00 $ Lights 6.00 $ Conveyor line free Total 96.00 $