The number one reason why kids quit swimming is that there isn't enough WATER POLO. Lots and lots of swimmers would stay much longer in the sport of swimming if there was a better connection between the water polo and swim programs. It is a good problem to have when a few of the swimmers QUIT the sport of swimming BECAUSE they want to be fully dedicated water polo. The easy way to start is to hold half of one practice every other week as a water polo scrimmage. But play with the real rules. Skill and drill a little bit. Sub in and out with a dry-land station for those just exiting the game.