Children and sports go well together. There are so many lessons to be learned on the field or court—the importance of cooperation, persistence, humility in victory, and grace in defeat are all paramount.
Also, at some point, you should figure out which team you're on. Or else, as one future basketball star found out, your coach may savagely block your shot to prevent the other side from scoring. When not even the people yelling "Nooooo!" from the stands can convince you to turn around and run for the other basket, there's really nothing else your athletic mentor can do.
If that doesn't make the ESPN top 10, there's no justice in this world.