You can use a volleyball net if you prefer, but not necessary. Set up teams and each team should have four people on it, so that there will be one person holding each corner of the blanket. Have one team serve the volleyball by placing the volleyball in the middle of the blanket. They are to lower the blanket and then raise it quickly as a team, to allow the ball to become air borne. The opposing team must catch the volleyball in their blanket and toss it back again.
Players are in circle formation, facing in.
Each is in wide straddle step with the side of the foot against the neighbors. The hands are on the knees. Two balls are used. The object of the game is to throw one of the balls between the legs of any player before they can get their hands down and stop it. Each time the ball goes between the legs of an individual, a point is scored against that individual.