Shooter incident at elementary school in Uvalde, Texas - 19 children and 2 adults dead

Where does a 6 year old get a gun?

Where does a 6 year old get lunch money?
You would think so. But when I was a kid, one of my classmates brought a large knife on campus and he had actually gotten it from a friend's house. So, a gun could come from someone other than the parents. Of course that's most likely the exception and not the norm.

I suspect most of the time with a kid that young, it's an older kid or sibling who knows where to find weapons in a home.