Young people and their activities always have been a part of history – yet such narratives have remained mostly untold and often lost in the sands of time. This unprecedented and international collection sheds light on youth's hidden histories from the nineteenth century to the early twenty-first century: whether from the American Civil War, Maoist China, postcolonial Greenland, or contemporary Iran. These tales of leisure, identity, and belonging take readers into the heart of youth history and uncover heretofore unrecognized cultural contributions that young people have made across time and throughout the world.