My kids smokes and their father don't smoke? Hmmmm, weird. I guess I'll let them once they hit 18 or something, or like whatever up to them. It's really their decision once they hit 18. But if I caught them smoking like before 18 years old, I'll slap em' lmfao. Seriously though, I will take action before they are legally aged but once they are, it's up to them.