“The radioactive materials which are included are not harmful.”
Unlike, say, a spinthariscope included with boxes of Kix cereal which contained a sample of polonium that only had a half life of 138 days. Talk about something that could put your eye out!
As a young teenager I became intensely fascinated by radioactivity after reading Danny Dunn & The Fossil Cave. Alas I was born too late to get a chemistry set that included samples of radium and uranium.
