@JMaxB @maique Interesting discussion. My wife and I don't have kids, but I remember from my own childhood that we thought "Wizard of Oz" was terrifying. But we all watched it anyway. It was like a childhood ritual. FWIW, I think it makes sense to let the kid decide. Horror is pleasurable for many people--of all ages.
I remember when I was something like 9 years old I watched the Vincent Price "The Fly." It terrified me--and I loved it! Heeeeeelllllp meeeeeee!