Psychological Sit-Up Game

Materials:
paper plates, whipped cream

Directions:
"Hypnotize" three kids so they can't do a blindfolded sit up. The first two are in on it. They strain but don't do a sit-up. The third sits up into a pie. Or, you can challenge them to do 10 sit-ups in 10 seconds, fir of them with their eyes closed. Still pie them towards the end.