I don't see Queen's response anymore, but she/he seemed a little determined to get a serious answer, so here goes...
My short answer, there isn't a way, well, not much of one.
Tea is boring. Its all about nuance and history and culture, not things of great interest to average teenagers. Yes, you can try to spice it up, make it interesting, which leads us to the "gateway" teas, fruity concoctions that are more similar to juice than tea. This works, but many remain unaware that tea can get better than Celestial Seasonings.
Tea is not in our culture, its not in theirs, its not in their parent's; they have few ways of being exposed to it. So like any other hobby, interest, or worth while pursuit, its kind of up to them to find tea decide for themselves. It is what it is.
But isn't that part of the fun? Tea wasn't something everyone else around us was drinking, we found it ourselves or it found us. I think many here have stories about their first cup of tea.