As noted, Supersaurus has appeared in many documentaries and in many other places. There was that website DinosaurDays.com, there was Mammals vs. Dinos, we saw a couple coloring pages and kids fact pages. We didn't see this yet though
Yes, it's a balloon
or even this toy
Made by Bandai... crazy Japanese video game companies!
There's also a band called Supersaurus. I'll let you make your own conclusions about their music when you find it, check YouTube. Also, here's a video about Jimbo, the dinosaur in the Wyoming Dinosaur Center: