Pass the Ball
I learned this game while working at the Barrier Island Environmental Education Centre.
Have your group sit down on the ground in a circle with their legs out in front of them. Squeeze everyone tight together so that your legs are touching your neighbour's. Place a tennis ball between the ankles of one player. The goal of the challenge is to pass the ball around the circle, from person to person, without using your arms at all. If the ball touches the ground you must start over. A good exercise in patience! This game can also be played with everyone sitting side-by-side in a line with their legs out in front of them.