The Gilbert U-238 Atomic Energy Lab is a toy lab set produced by Alfred Carlton Gilbert and sold between 1950 and 1951. They used radioactive materials in the set, but none that might conceivably prove dangerous. There was a Geiger-Mueller counter, a carefully designed and manufactured instrument that could actually be used in
prospecting for radioactive materials.
The Atomic Energy Lab also contained a cloud chamber in which the paths of alpha particles traveling at 12,000 miles a second could be seen, a spinthariscope showing the results of radioactive disintegration on a fluorescent screen, and an electroscope that measured the radioactivity of different substances.
(via Boing Boing)
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