Atomic Toys

Found here.

For about one year, 1950-51, the A.C. Gilbert Company of New Haven,
Connecticut (maker of the erector and chemistry sets for youngsters),
marketed a sophisticated toy, the "Gilbert Atomic Energy Lab." The
lab came with "three radioactive sources, a Geiger counter, and cloud
chamber where atoms could be split," according to a Univ. of Wisconsin
site. Although selling for the high price of $50 in the '50s,
production costs still outran its price tag, whereupon the atomic
energy lab was integrated into its chemistry sets for kids throughout
the '50s (google answers)

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