When the first player in each line crosses the baseline upon his return, the second player can take off dribbling. This relay race is won when one team has all of its players across the baseline. With beginner players, keep a watch on those who might lose control of their ball and wander all over the court. Collisions can be avoided with good supervision. If you only have two lines, spread them out as far as you can to avoid such dust-ups. Young players will be gaining all sorts of skills as they yell and scream and have a ball with this game.