Genetically your child has a higher chance of being interested in marajuana if you have been. It doesn't mean they will for sure, but it's 50/50. It's really good that you are thinking about this already. Teens break the rules, that's why I think an honest approach works best. When they are of age to know what marajuana is, give them the facts. Ask them what they think of it. If they ask you if you've tried it, be honest. Tween/teenagers know when their parent is lying. If you have this open dialogue about it, they will be more likely to ask you about it and talk to you about their experiences. It's ok to have rules about it, but kids break the rules when you don't know about it. If you talk to them about it openly, you can give them the knowledge they need to make decisions. Most tween/teens get their information from other teens in their class. They can't always make informed decisions if you don't talk to them about the facts.