Each day during the countdown to Christmas, children can unwrap a new story featuring trailblazers, pioneers, and dreamers who changed the world. Discover the incredible lives of Simone Biles, David Attenborough, Leo Messi, Harry Styles, Florence Nightingale, Usain Bolt, Mozart, Iris Apfel, Yayoi Kusama, Vincent van Gogh, Mary Earps, Vanessa Nakate, Mae Jemison, Gandhi, Katherine Johnson, Rosa Parks, Charles Darwin, Louis Pasteur, Stevie Wonder, Stan Lee, Kylie Minogue, Mary Anning, Dwayne Johnson, Leonard Cohen