For some reason, an ad from the comic books of my youth popped into my head, and naturally, with the miracle of the Inter-webs, I was able to see it again within a few seconds. Check out this site if you’d like to see more, and I’m sure the information superhighway is peppered with similar collections.
I never did order the submarine; I made my own prototype out of refrigerator boxes. I did own X-ray Specs, a Hypno-Coin and the Quail Incubator, and I wish I still had them today.