Whether you want to liven up a backyard bash or help your gang cool off on a hot day, this fast-action game will make quite a splash. Divide the group into teams of two. Have teammates stand six feet from one another, one holding a small cup with a Ping-Pong ball in it and the other a water-filled spray bottle. On "go," players with bottles try to be the first to squirt enough water into their teammate's cup to float out the ball. Keep a bucket of water nearby for refilling. If teammates get closer than six feet, they must dump out the water in the cup and start over.