Comment by paulchap

I think I read about something about a subscription bankrolled by the US government in an early edition of Make Magazine (2006-ish). Every month you'd get an item + a booklet of some sort which suggested an experiment. Apparently you got things like small fossils, and if I remember correctly, a small chunk of some radioactive material. It got cancelled in the 70s... I'll see if I can find it again.