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