Fraser Doherty; 16 years old Enterpreneur (SuperJam)

While most successful young entrepreneurs make their money building popular Web sites, Fraser Doherty built his empire using a more traditional way. Fraser started making jams at the age of 14 in Scotland, and by 16 left school to work on his jam business SuperJam full-time. SuperJam sells around 500,000 jars a year, which currently has around 10 percent of UK jam market.

(inspired by AmericanExpress)