A swimming game like tug of war.
Swimming pool Kick board
Players are paired together according to their kicking strength. Players lock arms or hold a kick board flat in the water between them at a designated center spot in the pool. On the command "GO" players begin kicking for a predetermined period of time (30 seconds is standard) in an attempt to move the opposing player backwards. The player who has crossed the center spot at the end of the time limit is the winner.