Indy E Cigs Indiana Vape Stores Smoke Shop in Indianapolis How Old Do You Have To Be To Vape? Smart vapes could be sold which prevent underage teens from using them. Basically, its not illegal for teens to smoke, But , You cant buy cigarettes or vapes , Adults arent allowed to give or buy them for you , You cant smoke within 9 metres of a public place , It's easier than you might think for teens to buy restricted e cigarette devices online CNN