Well when your under the required age to play airsoft, you got to start somewhere. Personally I think playing with those things in a park is bad idea because of the exposure. Oh and conrad, violence is not the solution to everything, if I broke his gun in half I would problably get beat up and have to pay for it. I can't bring him to an airsoft game because, I dont have an airsoft gun and im turning 16 in a couple of weeks, meaning ive never been to the field.
There isn't much I can do but encourage him to play out of the publics sight. If he would play reponsibly I wouldn't see the harm of those CT guns, thing is not everyone has a clue about safety.