Well if we look at things like Marvel they had several toylines based on there superhero characters. Power rangers and Dragonball still sell a lot of toys to children to this day. But if you want to really get that toyetic feeling. I'd suggest looking into things like Tmnt, Thundercats or some of the old Foxkids marvel shows. I know the spiderman one had a lot of wacky toys that were both featured in the show and some stuff that was toy exclusive. Basically you can make a trpg the traditional way, but you also have to think like a tv show/toy producer for some parts of the rules.