When I became a licensed driver, my friends and I went hunting, trap and target shooting on occasions. I just went into my Dad's arsenal to get the firearm I needed.
I taught my kids quite young. My youngest daughter is kind of a dead eye with my revolver. My son is a career Naval Officer. We gave him a Baretta as one of his commissioning gifts. I'm pretty sure that was legal in those days, or the statute of limitations passed at least several years ago.
I'll take my grand kids out and teach them the day they ask me. My oldest is eight, so it shouldn't be that much longer.
It's good knowledge to have, and a great hobby. If you do it right, it isn't particularly expensive. I feel sorry for poor souls whose parents never taught them to use firearms. That's a form of child abuse.