The 1950s were apparently a terrifying time to be a child. If a train wasn't coming out of nowhere to decapitate you, a seemingly harmless and endlessly fun game of "hide in a pile of leaves!"* ended when you were run over by city workers.
Buzzfeed's Copyranter got a hold of this amazing manual, and you have to see the whole thing. Titled "It's Great to Be Alive!", it was written by someone who knew how truly careless children can be. I'd encourage you to print it out and pass it around at your local elementary school but STRANGER DANGER. (Actually, that one is just good advice.)