Peter Pan, Alice, Christopher Robin, and even the four March sisters have something in common: they wouldn’t exist today if real-life children hadn’t inspired 10 renowned writers to immortalize them. A restless girl on a rowboat, a 5-year-old stuck in bed with scarlet fever, or a 12-year-old with a box of watercolors and nothing to do on a rainy afternoon were some of them. Here are 10 stories of real kids behind the books we never forgot.