My grandfather worked for AC Gilbert, which made the Erector Set, and American Flyer trains. I had rather complete sets growing up, and couldn't figure out why my erector set and toy trains were so much better than everyone else's. But another toy was a lead casting kit: You would melt lead in a crucible, which would then pour into a mold. http://www.girdersandgears.com/kaster.html Never had the atomic energy kit, pr…
Ha! Remembering back all the nights I hovered over electronics, soldering, breathing all those fumes, blown capacitors with nasty smoke billowing into a small apartment. You know you got a heavy dose of all kinds of nasty compounds when you can tell what kind of component blew by the smell only.