We've posted about some extremely unsafe toys here. the one that came to mind immediately when I saw the title of this Cracked post was the Atomic Energy Lab, and it's included. But the others are just as shockingly dangerous! However, I remember some of them from my own childhood, the childhood with no seat belts or bicycle helmets or minimum age for babysitting. Shown here is a kit for children to learn how to melt and mold their own lead, which could not only burn a hole through flesh, but poison your brain as well. NSFW text. Link