Ben Silbermann, a 30-year-old Yale University graduate who formerly worked for Google (GOOG), co-created Cold Brew Labs, the company that launched Pinterest, an image-sharing website. He grew up in West Des Moines, Iowa, where as a boy he enjoyed collecting things, according to Business Insider. "What you collect says so much about who you are," says Silbermann.
Kevin Systrom, a co-creator and the CEO of Instagram, sold his company to Facebook (FB) this year for an estimated $1 billion. Tech blog All Things Digitial also called the 28-year-old Systrom a "legitimately talented DJ."