Hey, you 21st century kids may have your Playstations and iPods...but back when I was a kid, we had Plastigoop!
Possibly created in some dark sub-basement of DuPont Chemical Co. or the Pentagon, Plastigoop was a multi-colored compound included in Mattel's Thingmaker kits, which kids could heat-set into several different shapes using various metal molds. Yes, heat-set...as in, "giving kids stuff to play with that could burn their skin".
The Thingmaker kit I vividly remember is the Creepy Crawlers set, which featured molds of all kinds of cool bugs, lizards, and assorted slimy critters. However...I wish I'd seen the other Thingmaker kit that was advertised on the back covers of July, 1967 DC Comics...The Fright Factory!
(click on the ad for a larger view)
Unlike neon-colored bugs and worms, Fright Factory creations could be worn on your face and eyes (perhaps imparting super-powers due to their mild radioactivity)...but beyond that, how about that AD? Imagine the horrified moms across the nation when they spotted that insane image while Junior read his comic book? Worse yet, how many kids actually followed the ad's suggestion and cut out the eye-hole? I'm sure just the thought of that would terrify those comic book collectors who "slab" their comics in hermetically-sealed plastic cases.
Though I wasn't able to find a retro commerical for the Fright Factory, I did find one for the good ol' Creepy Crawlers kit...complete with a mini-demo of the process. Enjoy!