The Most Dangerous Toy in History: Atomic Energy Lab

The most dangerous toy in history is the 'Atomic Energy Lab for Kids' with radioactive Uranium-238. The set was sold in the USA in the 1950s: inside were test tubes with real uranium ore (the authors assured there was no radiation risk if the instructions were followed), a Geiger counter, and other tools for 'exciting experiments'. This item was released due to the lack of strict safety standards for toys at the time, but it failed spectacularly due to radiation fears and a very high selling price.