Give a friend the pants off your legs -- and make it snappy!
Setup: You'll need several pairs of stretchy sweatpants for this challenge. Pair up players of similar size and have one player on each team put on sweatpants over her clothes. The teammates sit on the ground facing each other, with their legs stretched out in front of them and the soles of their feet touching.
At "Go," the pants-wearing player must transfer her pants to her teammate, turning the pants inside out in the process, without their feet ever losing contact. The first team to get the pants' waistband around the second player's waist wins.