When I was a kid I had a nice cannon. it was a modern artilery design about 8 inches long. It had a spring loaded breech that took a "bullet" about 1 inch long and 1/4 diameter. we used to set up these dinasour figures I had and shoot them over using the spring loaded canon.
It was great fun and I bet i would enjoy shooting at them dinasours even today as a 55 year old kid!
