Julie started playing with her brothers toy guns at three or four. We let her shoot the BB gun at five and before she was six she wanted to shoot the 22 rifle. The boys started at about eight with the BB gun and about ten with the rifle. The youngest girl shows no interest in a gun right now, she will be eight this Dec. You have to give them the means if they want to shoot, but don't force it on them. If she wants to shooot she will. You might take her with you when you go target shooting. If your wife shoots she may pick up on it sooner.