That is the debate to be had in parliament when the Referendum Bill goes through.
The argument goes that it will affect their futures so they should have a say. Well it will also affect the futures of 16 - 17 month-olds, should they also get a vote?
The problem with this Referendum is that most people, on both sides, do not have a clue about the EU. They both rely on myths, legends, hearsay and group-think. Teenagers are even less clued up.