My public speaking teacher always drilled into our heads: Know your audience. Thinking back on when I was a 7th grader, I can say for certain that I was never interested in finding a cheap way to innovate, or that I lived in the center of the startup world. Maybe it was just me, but when I was in 7th grade, I was primarily interested in making millions of dollars. Why not mention that you can make tons of money being a hacker (visual: Pictures of successful young founders from Google, Yahoo, YouTube, etc)? There's nothing wrong with that. =)

Of course, now that I'm older money is not the reason I enjoy hacking. But it definitely helped me get into it when I was younger.