Square One is the name of a show I've been trying to remember for mad long, every time I describe it to someone they tell me they don't know what the fuck I'm talking about.
I used to really love that show, as well as 321 Contact, Reading Rainbow and Sesame Street. There aren't many children's shows on that level of quality today, I'd say. However, there is a Saturday morning cartoon I saw a few months ago that had these kids from a school solving mysteries and talking in a pretty intelligent way, there were all different types of kids like it was some UN Ambassador school or something... I thought it looked pretty good, but damned if I can remember the name.