The children in the outer ring have the ball. When they hit anyone inside the ring with the ball, that person has to sit down and play no further part. The team in the outer ring wins if they prevent the other team from building the seven stones. If the members of the team inside the ring can build up the stones without being hit by the ball, then they win. After each round, the teams swap roles.
Maybe you would like to have a go at playing Caroline's game?