The Worm Song - joybell just above - seems to me something like a song that Shari Lewis used to do with sock puppets. She was around long before Sesame Street, but may have made some appearances there in its early days. This was in the 1960's.

Shari Lewis was responsible for "Lambchop" and "Harry the Horse" - I think she was also honoured by the United Nations for her work with children. She passed away some years ago.

Robin