Book excerpt: Anyone can learn computer science, even at the elementary school level. This book delves into the essential computer science concept of conditionals 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 conditionals are used in everyday life. Readers will follow a narrator as they search for different kinds of rocks and learn how they were formed. This fiction book is paired with the nonfiction book How Are Rocks Formed? (ISBN: 9781538353028). The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.