I have been going crazy looking for this animated segment that appeared on Sesame Street during the early 70's. It featured the letter S, and I know there was circus music. Then a block on some sort of unicycle wheel came along and out popped Sammy the Seal who told a short story about letter S. I loved it. However, darned if I can find it! If ANYBODY remembers this, please let me know! If you actually have a video of that segment I'm your friend for life!