This is a little contest we are going to try so our newbies can get a feel for it. Tie a 40' string with 20' of plastic streamer and another piece of 20' crepe paper behind a combat (or otherwise) plane. (80' total)
Go up and fly around in circles (none evasive). The one with the most cuts per flight wins. The round will last until one of the planes run out of fuel. This will be flown one plane at a time.
What do you think. Seems like this would be a good way to have fun and let the new and old guys get some practice with a fairly low chance of midairs. The paper streamer behind the plastic streamer should allow you to get at least two cuts per round. The smaller the pieces you cut the better.