I kinda feel like kids these days are exposed to weird shit earlier than we were. I'd worry less about him being too young and more worried about the psychic damage you're gonna take when he thinks it's boring.

I watched it at 11, spent half the movie thinking that I had half a medieval movie on the VCR tape (👴) because it didn't make any sense.

At the black knight scene I got the joke and rewatched the whole thing several times a month for a while.