In 1951, A.C. Gilbert introduced his U-238 Atomic Energy Lab, a radioactive learning set we can only assume was fun for the whole math club. (...) For a mere $49.50, the kit came complete with three "very low-level" radioactive sources, a Geiger-Mueller radiation counter, a Wilson Cloud Chamber (to see paths of alpha particles), a Spinthariscope (to see "live" radioactive disintegration), four samples of Uranium-bearing ores, and an Electroscope to measure radioactivity.

Inne ciekawe zabawki ;]. (via)