For all that I cannot read music, I grew up with a fair amount of music around me - well, music composed prior to about 1960. I'm a killer with musicals and learned a fair amount of folk music as a youth, though my parents missed the Beatles, so I did, too.
My knowledge of Disco was limited to Sesame Street. Wait, bear with me.
The disco version of Rubber Duckie is, may I say so, a true moment of musical greatness.
Think about it. "Rubber Duckie" is one of those songs that can be reliably cross-referenced in almost any setting and people will know at least some of it. Even kids whose parents held nothing but rabid hatred of PBS and all for which it stands could not possibly have escaped life without hearing this tune, and that goes double or nothing if your parents are college educated and placed strict limits on your television viewing.
(I will never understand why I could watch wildebeests getting devoured by lions on Nova but not Mork & Mindy. I will never understand this thought process. I'm not even sure that they'd seen the show; it aired on commercial television and that was enough.)
The creators of Sesame Street for my generation recognized that parents, older siblings, babysitters, etc. would end up watching the shows, at least in passing, with the toddlers. The occasional "late night special" included plenty of nods to this audience. For one special, shot ~1970, the cast got locked into the Met for the night. (Just try making a show with that premise that post 9/11. There's not a kid in New York, let alone by isolated rural town, who would buy it.)
Titled "Don't Eat the Pictures" (a name later used by the Met for an exhibit)the story is a hoot and a half even to me as an adult. Cookie Monster sings: the title track , which I loved as a kid and still sing in museums.
Don't even get me started with Mr. Rodgers...