OK, for those not familiar with the game;
It's baseball, with the small white leather covered projectile replaced by a large rubber air-filled ball, and the bat replaced with your foot. The ball is "pitched" along the ground, and you kick it, with roughly the same rules applying - four bases, three "strikes" and you're out, fielders pick up and throw the ball, you're out if you're tagged with the ball, etc. The field positions are even the same, although the outfielders are closer in, and I thnk the diamond's usually smaller than a regulation baseball diamond.
It's a popular way to get the unathletic out and running around in school gym classes, so it's been taught in american schools for years. And it's a better use for those balls than the sadistic game of dodgeball.
Oh, wait.
There's a website.