I have a 6 and 9 year old. because of our impending trip I have talked to the 10 year old about marijuana. I told her it is something some adults do, in my opinion it is safer than alcohol for adults but a very dangerous substance for young developing minds. Also that it is a big part of the Jamaican culture and is also used in by the rastafari religiously. I knew if I didn't talk before, it would come up when I wasn't prepared. we are taking them to seastar feb 1st. the 6 year old wont notice so I left that alone. Don't know where your from but at 15 you can bet the kid has already seen it at school.