As another work from the popular science series 12 Letters from Scientists to Children, this book adopts an epistolary format to introduce young readers to unmanned aerial vehicles (UAVs). Across twelve chapters, it chronicles UAV’s origin story, explains their flight mechanics, traces their technological evolution, and showcases their applications. Over 60 vivid illustrations, photos, and comics make complex concepts accessible. Unique “UAV ID Card” section serves as quick-reference guide for deeper exploration. With the author’s letters, the readers are allowed to appreciate the charm of UAVs and consider their military applications and societal impact.