Anyone can learn computer science, even at the elementary school level. This book delves into the essential computer science concept of debugging using age-appropriate language and colorful illustrations. A meaningful storyline is paired with an accessible curricular topic to engage and excite readers. This book introduces readers to a relatable character and familiar situation, which demonstrates how debugging is used in everyday life. Readers will follow Fen as she finds and fixes a problem in the circuit she's made. This fiction book is paired with the nonfiction book What's Wrong with the Circuit? (ISBN: 9781508137603). The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.