BuzzFeed:

Only available from 1951-1952, this science kit for CHILDREN included 4 types of uranium ore, a Geiger counter, a comic called “Dagwood Spits The Atom” and a coupon for ordering MORE radioactive materials. One of the four uranium ores included was Po-210 (Polonium) which, by mass, is 250,000 times more toxic than hydrogen cyanide. “Merry Christmas Kevin, here’s that giant box of poison you asked for.”

That’s pretty bad but what might even be worse is the fact that, I’m sure like a lot of you, I actually had many of those old Hardy Boys books they talk about!