[RKDinOKC]

At fun fly competitions we dropped water balloons. Just rubber band a styrofoam or paper cup to the plane, put stuff in it and you got a bomber. It was a lot more accurate to do a dip with the pane to get the water balloon to come out of the cup than to roll the plane upside down.

A couple of guys had planes with a bomb bay with servo actuated doors for dropping stuff. They dropped candy for the kids at events families attended.

One guy rigged his plane to light and launch pop bottle rockets using model rocketry ignitors. The safety kings freaked. But it did make for a good show at night flys. He just had to make sure he had a good fire extinguisher.