The best way to parent is expose your kids to guns and tell them to be careful. No need to lock 'em up because that's how my dad did it.Gun safes are a waste of money.
And what would locking them up have to do with this situation?
He was going to clean the gun. Is he supposed to do this inside the safe?
Expose the kid to guns. This is a good idea. I'm betting he didn't go over the rules. "Cause the kid is too young". And cause I don't think the parent knew.