"There's gentle humor, compelling (but comfortingly minor) angst, and a loving family to keep the boy safe through his adventures. An intriguing approach to exploring a familiar natural phenomenon, this will appeal to thoughtful young listeners who may want to share their own experiences in response." -- Kirkus Reviews "There's something comforting about this slow, methodical laying out of possibilities. The point is not to convey knowledge or demonstrate cleverness; rather, it's an exploration of how we come to know what we know. A calming book for the end of a long day." -- Publishers Weekly.