This is a cannon that we built out of five pieces of wood and a PVC pipe. We first put a flat board on the bottom and nailed two long board's on top the flat one. Then we put two more long board's but we cut a slot on both ends and that is where we put the nails to hold it down. Finally, we got to put the gun on which we made out of the PVC pipe. We had to drill a hole in the PVC pipe and both board's that is where on the top we put a bolt through and tightend it up so it won't fall down when we play. It can go up and down. We might put wheels on sometime, still thinking.
Thanks for reading!!