Mixed gender teams celebrate inclusion and foster healthy bonds among all kids, according to Jude Larene, youth director for DiscNW, an organization that promotes and develops the sport of ultimate frisbee.

Ultimate frisbee is one of the fastest growing sports in the country right now, and it's a sport that not only allows boys and girls to play together but actually welcomes it.

Some psychologists predict that children begin to develop gender stereotypes between the ages of nine and 11. A sport that allows for girls and boys to play together may help prevent stereotypes from developing in the first place.