I have serious mixed opinions about my boys with the NERF toy guns shooting those little darts at each other. 11 and 4-1/2. They have fun but I'm wondering to myself.. if they do this with the NERF guns what's to stop them from doing it with a real gun later in life when they are just 'playing'. There's no second chances with real guns or ammo. Guns @ home here a under lock and key or in my possession. I'm more concerned about them getting into something at a friends house where possibly the friend cannot distinguish between real and toy. Considering throwing out the toy guns all together but what kind of a childhood would that be. Thoughts?