A children's book about growth mindset may seem like a daunting subject, but in this informational picture book, the authors skillfully break the topic down into accessible and relatable segments. First up is an overview of the brain (shaped like an adorable pink walnut with oversize eyes and glasses) and how its different parts e motor cortex, occipital lobe, etc. rform special jobs for the body. Likening this organ to a muscle, the authors focus next on the many ways the brain becomes stronger while the body sleeps. For instance, they describe in simple yet comprehensive text how the brain develops neurons, remembers what it has learned, forgets bad memories, and even takes a "bath" to remove germs. In each of these sections, the text also reveals how these functions contribute to learning, being resilient, making better decisions, and staying healthy. The final section emphasizes the importance of sleep, including the benefits of getting enough sleep and the negative effects of having too little. The incorporation of cheery children throughout makes these lessons on brain health all the more enjoyable.