The "Letterman" feature from The Electric Company stands as an example of how lucky my generation was, in a way. This was children's entertainment mixed with education that someone had really expended some care on. While the animation was somewhat limited, the backgrounds had a fascinating quality, like etchings that had suddenly become stages.
Also, Letterman was voiced by Gene Wilder and the Spellbinder by Zero Mostel, so while I didn't have that context, it was a grand battle between Leo Bloom and Max Bialystock.