There's a lot of interesting directions to take this. How do you get out of the trap of thinking that people who vote in their self-interest or disagree with you are incapable of making good voting decisions? Or, even whether you frame voting as a privilege or a right?
Teens who have jobs, pay income tax, teens who buy things pay sales tax, and yet aren't represented seems like a contradiction in our foundational principles. It fundamentally strikes at the question, "How are rights formed?" If the answer starts and ends with, "asking the people nicely," then we have some history to revisit.