The rewards come in the form of watching the kids having fun at a game or practice, and watching their individual skills and teamwork improve. There is also a great sense of accomplishment when you look back at the end of a season and see just how far the team has come.  And for those who have "serious" jobs, there is no better way to regain your perspective than to watch a bunch of young boys or girls working so hard to master a skill that you have taught them, and to see them having fun doing it.