+1 for Glen E. Meyer.
My kids are 13 and 14 (girl,boy). They are both excellent shots, 'A' students, Sports etc. (they have it together in spite of their dad
). When I am not at home, ALL the firearms are locked up, when I'm home, my CCW pistol is either on my hip or in my bedroom. When they have friends over, its either on my hip or locked in the safe.
Education and eliminating the curiousity factor is Dead on! My kids help me clean/work on the guns, reload and shoot all the time. I trust them with firearms WAY more than most adults I've shot with. However, THEY are Teenagers, They DO NOT have unsupervised access to ANY of the firearms.
When they were toddlers, I NEVER left a firearm unattended. Always in the safe, or on my person.
Hope that helps,
AJ