As one of the resident Old Farts, being born in '69 I'm remember enough of the 70's to feel like a kid of both decades. Some of the stuff you guys are posting (like Schoolhouse Rock for instance) are actually legacy items passed on from us 70's kids to the 80's. There was some things from 70's that, in a more perfect world, would have lived on that you guys who came later missed out on:
Shogun Warriors, contemporaries of the large Godzilla figure and precursors to the Transformers (smaller versions could change shape and there was one named Megatron in the Shogun Warriors comic book).
If Darth Vader fucked a Lego, their unholy offspring would have been Baron Karza:
The Micronauts were the ultimate transformers before The Transformers. Dozens of different figures and vehicles, and most of the pieces were fully interchangeable between them.
Ahh the heady days of toys with spring loaded projectiles that could choke your toddler cousins faster than you could say "Fire!!!".