Yep I remember going squirrel hunting at age 7 using a 22.
Like I said I don't have any now but wish I did. Only been shooting once in the last 10 years and that was about 2 months ago over at a friends house. Still able to hit bullseye at 75 yards but that was using his police issue AR-15 with some really nice iron sights.

I don't feel like I need one for protection, but I really feel my son needs to learn to shoot and all. I'd rather him know from me, rather than first being introduced to them by anyone else.