I don't have any children yet, but I've smoked pot and it isn't that bad for you. I'd just tell them about pot. I'd tell them don't drive afterward, make sure to have plenty of snack food around when they do. Don't drink while smoking pot, because it's just going to make you want more alcohol and then you won't be able to feel the affects of the booze. I'd say that pots fine if you want to use it, as long as it's just every once in a while, and you're not doing hard drugs. Not to do any other hard drugs because I won't put up with that. A child has to make their own mistakes, and i'd rather have my kid smoking pot than injecting heroine or smoking crack. So if the kid likes pot let them smoke pot, just monitor it.