Hitting it Big Before Hitting Puberty

If Mark Zuckerberg has taught us anything—other than the fact that the Internet never forgets—it's that you don't have to have grey hair to be a millionaire.

Before we dive into all the good stuff, a disclaimer: you almost certainly will not be a millionaire by the time you're 21. That's just not how it usually works. Our point here is that it's not impossible.

And hey, it's fun to dream.

You might have an allowance of $5/week or you might make $8/hour folding shirts at Old Navy, but some students are becoming millionaires before they even hit prom.

• Consider Cameron Johnson. By age 12, while most of his classmates were worried about their cracking voices and pimples, he was making a cool $50,000 by reselling his sister's stuffed animals. (Hope he asked first.) By 15, he was on a board of directors in Japan and had written a best-selling book about his business dealings. Not bad.

• Then there's Noa Mintz, the 15-year-old who started a business to match babysitters to frazzled parents. She's raking in about $500,000 per year running her own company.

• Or how about Nick D'Aloisio? When he was 15 and most of his friends were using apps, he was in his parents' house coding one. Two years later, he sold his Summly news feed app to Yahoo for $30 million. He was 17.

• And if you think you have to be born into a richie-rich family to make your millions, you might want to read about Farrah Gray. In his inner-city neighborhood, Gray made and sold his own bookends and body lotion. Want to know how old he was? Six. SIX. YEARS. OLD. By the time he was eight, he launched Urban Neighborhood Enterprise Economic Club (U.N.E.E.C.). And by the time he was a teenager, he was a millionaire.

• Last but not least, you can't forget about Internet stardom. Hello, Evan of EvanTube. The kid started his own YouTube channel at the tender age of 8 and reportedly rakes in about $1.8 million a year thanks to his cute-as-pie broadcasts about toys.