Do you guys remember the 'Tweedle Bugs' that lived in the windowbox of Ernie and Burt? LOL They were my favourite. And I remember a skit, not totally sure if it was on Sesame Street or Electric Company but it was of two tabby cats that absolutely demolish the inside of a doll house? I loved that one too.
And I also liked the painter guy who painted a number, I think it was '7' on everything, including with mustard on bread and on the elevator doors and stuff.
Snuffleupagus was my favourite character with those sad eyes of his. It drove me crazy that nobody ever believed Big Bird. lol

My fav kids show growing up though was Mr. Dress Up. I think it was only aired in Eastern Canada though. Not sure.