Leosghost - 1:19 am on May 13, 2013 (gmt 0)
Never mind home chemistry sets; you could get atomic energy kits complete with miniature Geiger counter and sample-sized nuggets of uranium and radium. (Was going to say plutonium, but repeat visit to site tells me my memory was wrong on this detail.)
They may have been being less than honest about what you'd actually receive..remember the x-ray specs ads..
I actually knew a guy who fell for that..each "lens" in the cardboard "specs" was dark plastic sandwich with a scraggly chicken feather stuck in the middle to give the illusion ( to the near blind ) that they were seeing bones in their hand..and not the "see through jumpers and skirts" that he thought he was getting..:)
In later school years I won a great deal of lunch money off him playing cards and various other ways ..he was not the sharpest knife in the drawer..but apparently there were many others like him that wrote away to small ads in DC or Marvel comics..or delivered "Grits"..or bought "sea monkeys"..or "1000 super powerful magnets" etc..
Last time we met ( over 30 years ago ) he was an oil tanker captain for BP..( Hi Sean )..and still easily scammable[sic?] if I had been so inclined..