Famous-Heroes Color and Play

Here's a box set Colorforms Activity toy which features  Famous-Heroes or more commonly called today, superheros.  This is copyright National Periodical Publications, which I believe is now DC comics and the set is dated 1973. It features: Superman, Superboy, Krypto (the superdog), Aquaman and Aqualad, Batman and Robin, Green Lantern, the Flash, and Wonder Woman.  They are black and white and meant to be colored.  The set comes with 8 Crayola crayons, which are still unused and in the box.  It also says the colors can be wiped off and the figures colored again, but I'm not going to try and see if that works!  The figures also all have stands.