My favorite was the 2-boy submarine. I think I saw it in the Archie Comics edition of The Shadow, but it may have been in The Fly or Herbie. Always wanted it, but you know how parents are. Later I found out the thing was made of cardboard (never crossed my mind) and was not made for water. I suppose that means you really couldn't get to Mars in the spaceship I saw in the comics ads. I did sell flower seeds door-to-door that I got from a comic...earned enough credits to get a chemistry set and a microscope> I thought they were great.