A lot of times people comment that you should have your guns locked up and not accessible to your kids. I agree with that and that's what I do. However I also sometimes see stories about how a kid used a parent's gun to successfully defend him/herself or family and I realize my kid wouldn't have that option.

http://pithocrates.com/2013/01/13/a-15-year-old-boy-saves-his-12-year-old-sister-with-an-ar-15-assault-rifle/

http://www.infowars.com/boy-stops-murder-plot-with-gun-national-media-ignores-story/

http://bearingarms.com/good-kid-gun-teen-saves-mother-attacker-tennessee/