21-year-old Israeli Tomer Hen started mobile advertising when still at school. When he graduated from high school he had already made $250,000. His communication skills helped him to launch the Tomer Hen Mobile Marketing College. Now he is CEO of MobCo Media, with 10 employees.
http://www.timesofisrael.com/meet-tomer-hen-israels-21-year-old-marketing-phenom/