British warm-up tag is a team dodgeball game. One ball, two teams. Run away from the person who has the ball in his hand to avoid being hit by the ball and eliminated from the game.  If you have the ball in your hands, you may not move your feet, but you can toss the ball to a teammate who might have a better chance of throwing it at an opponent. I imagine there will be lots of running around, and perhaps even a little strategy involved in playing this game.