Still not completely convinced, as they state the vapor is not harmful but thats like saying letting my 4 year old vape occasionaly would not be harmful to him!! I do realize that the vapor "probably contains almost no nicotine",and propylene glycol is "largely absorbed and little is exhaled." but that doesn't mean that continuous long term exposure to these little amounts may have some negative effects associated with nicotine use? I guess I worded my first comment wrong, as it is not the addiction I am most concerned about, it is the long-term exposure effects of nicotine. Don't get me wrong, I am completely pro-vaping and I am convinced that it has saved my life, but I am still unsure about exposing my children to it long term, as I had never exposed them to second hand smoke before (and yes, I do realize that is 1000 times worse). I may just be a paranoid, overprotective mother though, as I am sure many will beg to differ.