Eleven-year-old Tilly saved lives in Thailand by warning people that a tsunami was coming. Fifteen-year-old Malika fought against segregation in her Alabama town. Ten-year-old Jean-Dominic won a battle against pesticides--and the cancer they caused in his body. Six-year-old Ryan raised $800,000 to drill water wells in Africa. And twelve-year-old Haruka invented a new environmentally friendly way to scoop dog poop. With the right role models,...