2 Chairs at each end of the playing area. Around the chairs there is a "monkey area" where only the goalie can be. One ball in the middle. Teams are trying to score by hitting the chair with the ball. The monkey has to guard the chair from the ball hitting it. Teams can only move when they don't have the ball and can only pivot when they have the ball. Similar to ultimate frisbee, but with a foursquare ball. It's a blast and it gets a little exciting every once in a while.