Man, there are a lot of great little kiddy shows out there to mention. Clearly CTW's earlier works like The Electric Company and Square One Math were really amazing, and the epitome of educational and entertaining. And we cannot forget the great Mr. Rogers. The name just says it all.
I also loved Zoobilly Zoo (Ben Vereen- all I have to say).
I have a real special place in my heart for all kids' shows like these, dispite it not being the feild I want to get into (7-12 and 20-30 year old guys type shows, Animaniacs, Freakazoid, The Tick, etc is where I wanna be). I especially love 2 Japanese kids shows:
Doraemon (which Fairly Oddparents unintentionally borrowed from) and
Anpanman (Sort of like Strawberry Shortcake or Care Bears, but much, much more interresting. It's really really weird, hense why I like it).
But there are quite a bit I really enjoyed.