Care to enlighten me? Or did Mr Obvious tell you to post that.
Bob, first I am not trying to make a generalized judgement on your parenting practices. Only on this particular situation in which you asked for our opinions. You must have been wondering yourself or you would not have posted a question. No need to be sarcastic if you don't like the answers.
1. IMHO I can see many dangers in letting a 2 yo play with batteries that contain possibly poisonous and corrosive substances. 2 YOs will put anything in there mouths and chew on them.
2. You took out all of the parts but does that mean he cant unscrew the tank and start chewing on that?
3. The boundry issue has already been discussed buy others and rebuffed by you so no need to beat that horse any more.
4. You already stated that your son had grabbed your vamo before. You think that is NEVER going to happen again? After practicing with his new vaping toy, maybe next time he will have figured out how to get some nic laden vapor out of it.
5. Lets face it. With a few exceptions, vaping is a way for adult nicotine addicts to get their fix without many of the health concerns of smoking tobacco. I may be old school but encouraging a 2yo to emulate an addictive behavior seems way wrong.
6. BTW - I am a single dad. I have been called many names before but have never been called an over-protective parent. Personally, I can see no pros and many possible cons in letting small children play with old vaping equipment.
You have gotten many opinions here. In the end, we all have to do what we think is right for our kids. Good Luck to you and your children...;-)~