I had a pretty tame childhood but if somebody wants ideas, you're welcome to whatever you can use:

I don't recall lighting things on fire but my dad turned us loose with hammers and nails at young ages (my favorite was the ball peen, which was the only one he had that was small enough for me to manage when I was three). We also spent a considerable amount of time climbing trees unsupervised and eating plants that might or might not have been technically edible (did you know that tulip buds are sweet?). We also burned a lot of stuff with magnifying glasses. I'm told doing this to plastic releases cyanide fumes but, eh, nobody has died yet.

My father's idea of "bedtime stories" included The Hound of the Baskervilles, the story of Odysseus and the cyclops, and the saga of the forest fire that destroyed Hinckley, Minnesota, in 1894, complete with all the gory details he knew.

I think I was just old enough to be pre-Raffi so my parents taught me "Jesse James", "Captain Kidd", "Joe Hill", and "Lightning Bar Blues" instead. I knew all the words by age five. I guess "child-appropriate" is in the eyes of the beholder.