It's half basketball, half volleyball. It's totally challenging and nothing but fun. This powerball game is played on an inflatable, screened-in, 18' by 18', two-sided court. Two or four players may compete, trying to score points from either side of the court, by jumping and throwing a ball through tubes to the other side. If the ball makes it through and lands on the floor, a point is scored for the shooting team, and the defense takes the next serve. Slam-Ball is a fast-action game that will perk up any function. So power up and party on!