Discovering Playmates was one of the best things to happen to my family in San Francisco. Its a wonderful community of parents and teachers. The space is great too — you really should visit to see it for yourself.Because its a co-op school, parents are expected to do some volunteer hours each semester. Rather than a burden, this has actually been a lot of fun — its a chance to get to know other families and become more involved in your childs schooling as well. Its been a great experience overall.