I saw "Snoopy" performed by students at my HS, and "You're a Good Man Charlie Brown" at CSU.  One of the reasons why the "Peanuts" comic strip is so enduringly popular is that it recognizes that children are people too.  It is about the human condition, and the cast just happen to be children.  I think there is a major tendency to forget just how terrrible being a child is sometimes.