Just in time for Christmas, the same isotope: U-238, which has been linked to Gulf War syndrome, cancer, leukemia, and lymphoma, among other serious ailments.
The set came with four types of uranium ore, a beta-alpha source (Pb-210), a pure beta source (Ru-106), a gamma source (Zn-65?), a spinthariscope, a cloud chamber with its own short-lived alpha source (Po-210), an electroscope, a geiger counter, a manual, a comic book (Dagwood Splits the Atom) and a government manual “Prospecting for Uranium.”
Wow. I had one of these and let me tell you that the Cloud Chamber was way cool. (Also had a radium dial watch.)
Sooo, playing with this gives you cancer?
@caradoc: I had one of these, too! And I remember carrying the Geiger counter and a chip of uranium ore in a little plastic box to school with me! God, those were the days!