It didn't take long once Gurbaksh Chahal 's family emigrated from India to San Jose, Calif., for bullies to target him. "Kindergarten was my first reality check that I looked physically different," Chahal says. Kids started trying to hit the turban off his head when he was 5, and the bullying intensified through middle school and high school. "It got more personal with name-calling and more threatening, violent," he recalls. "As time went on, it got rougher and rougher. A 5-year-old bully is very different from a 15-year-old bully." With no friends to hang out with, Chahal had the spare time to work side jobs and make thousands of dollars buying low and selling high -- he'd buy refurbished printers from a local flea market for $50 and sell them on eBay for up to $200. He used that money to capitalize a startup, ClickAgents , at age 16, and ended up selling that business for $40 million. Then he started his second busines...