Sometimes, kids can be very adamant about their desire to smoke. If they have friends at school who smoke, they might want to light up so those people will think they're cool. But you can establish that, whether or not your kids like it, you have rules about smoking, just like anything else in the house. For example, you can't get your driver's license until you turn 16, and you have to do chores every week. Compare more mundane rules like those to your rules about smoking [source: Dowshen].
It's also a good idea to help kids understand peer pressure, and give them the confidence they need to do things differently than their friends or the popular crowd. Practice scenarios with them, and teach them what to say if someone offers them a cigarette. There's no need to get preachy. Tell your kids they can deflect the situation with humor, saying they don't like the smell, for example [source: Health Canada]. Or that they tried smoking before but don't really like it. Finally, if someone does judge them or exclude them for making "different" decisions, encourage them to spend time with other kids who will be more accepting [source: Dowshen].