A group of children should propel the balloon overhead to a certain mark or, in this case, to the wall of the hall. Then they turn around and try to go back as far as they can. If the ball bounces on the ground, the game is over. Each child may only touch the balloon once, then they have to get back in line.
This exercise is ideal for a camp or group training with lots of children. You can form several teams and run it as a competition. Which group will make it there and back?