The Atomic Energy Lab & Gilbert Atomic Energy Lab
( holy crap this is outstanding
)
From the same webpage as above:
"The Atomic Energy Lab kit produced by the American Basic Science Club came with real samples of uranium (which is radioactive) and radium (which is a million times more radioactive than uranium). Since the mere presence of radioactive material in a children's product clearly wasn't insane enough, some of the experiments detailed in the manual also required kids to handle blocks of dry ice. Dry ice, by the way, has a temperature of minus 109.3 degrees Fahrenheit, and it's recommended that it only be handled while wearing gloves (none were included).
Gilbert, of course, couldn't be left behind and introduced their own Atomic Energy Lab, which also came with radioactive samples and even a little Geiger counter that kids could use to measure the amount of radiation left in their bodies after each play session."