they used to let kids have real fun
There's an xkcd for that :3
Side note: polonium-210 is a very dangerous isotope, however it "does not pose a radiation hazard when kept outside the body", as the alpha particle it emits have very little penetration power and cannot pierce even the outer layers of dead skin. It has still killed countless people, though, not because of children's rings, but because of tobacco. Polonium latches onto and concentrates in tobacco leaves, leading to heavy smokers being exposed to more radiation than survivors of the Chernobyl disaster.
It's always wild to me seeing comments about different toxins like this on information about random things in the past, but it's never discussed when it comes to cigarettes.
