What's your stance on it?
My nephews are 3 and 5 (I think) and my brother and his wife smoke around them constantly. I've tried gently persuading him this might not be the greatest idea. Not that I have a problem with the kids knowing that they (we) smoke pot... I couldn't care less, I don't see the harm it'd cause. I'm against the idea because the oldest goes to public school. I remember when I was in elementary school the dare officers would give us signs to watch out for if our parents were using drugs, and if they were to report it to the school. If it happened I doubt the cops would even bother with it, but I bet social services would fuck with 'em.
Maybe I'm just paranoid, but it seems like a dumb idea to me.