Barbara Perry brings best friends Willie and Arnold back to life in this educational and relatable story about the excitement of change. When King Hugo of the Raindrops announces that all the raindrops are moving, Willie and Arnold are unsure about a new location and making new friends. However, the boys attend a new school where they encounter friends in unlikely places. Instead of seeing just water, the two friends meet snow, ice, wind–even polar bears! Their new friend Siku teaches Willie and Arnold to transform their shapes, Jack Frost tells them how to glide in trees, and Holly explains what fog is. The boys learn through the experiences of their new friends that being different is great, and that there is no reason to fear change. With a helpful glossary to reference, kids will love continuing to learn about all the different parts of the water cycle!