Bomb drop - piece of dowel attached vertically to plane with rubber bands. Toilet paper tube or similar over it, climb and roll or loop over the target to drop it.

Climb & glide - pilot gets 30 seconds to climb as high as possible. Must kill the engine then glide as long as possible while dead stick. Longest glide time wins the event; can get bonus points for landing closest to a mark.

Bowling - plastic pins and a plastic ball attached to plane on a long string (25 foot). Fly down the runway and knock down pins. It's MUCH harder than you might think. (Just be sure to tie the string ahead of the CG.)

Almost any event can be done with a trainer. In fact, depending on the events, we've had trainers beat fun-fly type planes.
Dennis-