Beach Ball Race
The players push the ball with their nose, while swimming, from one end of the pool to another.
The first player to reach the end, wins.
If pool happens to be overly crowdy, you can divide the players into teams, and play the game as a relay. First member swims across the pool, with the ball, and when he reaches the end of the pool, next member jumps in the pool to push the ball back to the beginning.
