Varies check your local laws.
What do you mean "it varies"? What? The laws on minors buying batteries? I didn't know those kind of laws existed. PV's without nicotine are essentially the same thing as a fog machine or an inhaler.
I would like to know why minors cannot buy PV's and non-nicotine juice. It is only a heating element, battery, and a mouthpiece.
You dont have to be 18 to buy heating elements.
You dont have to be 18 to buy batteries.
You dont have to be 18 to buy PG, VG or flavorings.
But you have to be 18 to buy PV's, which are basically all of those combined?
Not allowing a minor to attend vape meets makes sense to me. I mean, with all the vendors handing out free samples(with nicotine, I assume), It would be inevitable that one of them would assume he/she was 18+ and give it to them.