That's the right mindset. If you smoke your baby is smoking too. The particles get on your clothing and permeates into the house. She could develop asthma.
On a lighter note, if he can do it you can too!
Moral of the story go through "Play Therapy."
That kid will die of fatticity long before lung cancer lol. I find it funny that they mention how young smokers are when the parents have to be the ones responsible for turning them on to it.
I once went to get a dime sack and the drug dealers sister was having her kids teach another girls kids how to smoke out of a bong. They couldn't have been older than seven and probably closer to four.
The drug dealers family had these funny games where they would pass two pipes at opposite directions and when someone got both at once they would all exclaim "she or he has to take two hits!" Fawkin weirdos, lickin the resin out of the ends of antlers and all that. Real mountain men/stoners.