A joyful, inspiring picture book that introduces readers to eleven young people from around the world who didn't wait until they were grown to speak up about things that matter to them and change the world for the better, from an award-winning author and New York Times best-selling illustrator.

From climate activist Greta Thunberg to anti-bullying advocate Jaylen Arnold to peace activist Bana Alabed and more, these short profiles of young people and their causes will inspire readers to think about what matters most to them. An author's note, Actions to Make a Difference, and additional resources are also included, providing a roadmap for any kid who wants to make change and help others too.