Meet history's game changers! This biography series is for kids who loved Who Was? and are ready for the next level.In August 2016, American gymnast Simone Biles won four Olympic gold medals! Her irresistible smile, fierce determination, and unbeatable strength have made her a favorite around the world. Find out how the girl who taught herself to flip on the backyard trampoline blazed a trail in gymnastics.Trailblazers is a biography series that celebrates the lives of amazing pioneers, past and present, from all over the world. Get inspired by more Trailblazers: Neil Armstrong, Jackie Robinson, Jane Goodall, Harriet Tubman, Albert Einstein, Beyoncé, and Stephen Hawking.