Yeah, OK, I'll admit that in 1970, when I was a kid, I had a black light and a couple of black light posters. But, that's where my cool act stopped, baby.
I gotta admit ,I was an ordinary suburban Midwestern elementary school kid who took a Peanuts lunchbox to school and collected Hot Wheels cars, and, therefore, pretty much a wee juvenile pimply poser when it came to being cool in the 70s.
Go and look at Johnny C's blog Hole in the Head, which nostalgically showcases a bunch of cool catalog pages from the whacky 1972 lifestyle. Black light Tweetie & Cool Cat posters that I get to paint myself?! Where's Mom's Mastercharge?! And look at the cool the inflatable furniture!
PS For more 70s fun, check out The Strata Action Team page from Adult Swim. It's a fun preview. Maybe not as good as the funny cheesy Tenacious D clip, but pretty retro hipster-doofus cool if you're into parodies of bad live-action kiddie shows of the 1970s.