I was raised with handguns and rifles in our house. We were all pretty good marksmen. Myself, I only shot at targets of the non-breathing type, and miss the thrill and fun of target practice to this day.
At home, our guns were locked away.
When we went up to our cabin, one day, me , following hopping grasshoppers, bent down intent on catching one, and came face to face with a rattler who had been minding its own business, sunning itself, when I startled it by getting too close, so he started shaking his tail and rising up, with me screaming my lungs out. My dad, later saying he knew by the tone of my scream something was up, came running with his pistol drawn and blew the rattle snake's head, clean off.
My Grandpa taught my Dad when he was a little boy how to handle guns, as my Dad taught me.
I also was taught how to cook on a gas stove, (stand on a stool with mother's supervision) chop vegetables with a sharp knife (fold your fingertips back with my Dad's watchful eye) and do embroidery work with needles (you wear a thimble).
So that you don't hurt yourself, those are all skills a person needs to learn.
If the adult teaching the child wants to wait until the child is older, say 8, would that be better?
Everybody is different.
I am glad they had a fun, supervised day and cared to share it with us.
LoisLane