As we age, we look back longingly at our invincible younger selves and wish we could go back and do it again, with the knowledge we’ve accumulated over the years. What if you had instituted a workout regimen in your teenage years? What if you knew and appreciated healthy food options? What if you wore more sunscreen and drank less soda? Your teenage children provide you a chance to pass on that advice. Help them set a foundation for a healthy adulthood.