It sounds as though you and hubby are going about this the right way. We grew up in a household with guns-my dad was in the military, and both he and my grandparents were hunters. We kids were taught gun safety much the way you are teaching Jax-by making the lessons appropriate to the age of the child. Most of us kids in the family began learning to shoot (supervised) at 8 or 9, with the emphasis on gun safety-we began accompanying our relatives on hunts shortly thereafter, and were always with an adult on hunts until we were 15 or so.
It wasn't until my grandparents moved to Florida when I was about 14 that I learned how to shoot, but that was because we livedin the city. By that time Pop no longer hunted and my dad was never a hunter, so I've never been hunting.