Understanding life cycles is essential to understanding nature and the world around us. From kittens and cats to caterpillars and butterflies, life cycles are endlessly interesting to young readers. In this volume, they gain important insight into different life cycles—accompanied by a cute, blue monster named Mo! With questions and short activities throughout, the main text engages readers by directly addressing them and inviting them to explore the world with Mo. Accessible language and thorough explanations of important science concepts support science-classroom learning and encourage comprehension.