While some readers may disagree with the author's treatment of how water got to Earth in the first place millions of years ago, this book treats the subject of water and conservation in language that children can easily understand. By learning how clouds, rain, snow, and hail form, children learn that the ways of the water cycle are influenced by many factors, most importantly perhaps, the human one. The vocabulary moves from plain to specific, and the expository text is simplified using question/answer hooks. Some of the text is not very satisfying, such as "Gray clouds shade the sun," or "Droplets collide with other droplets and join together to form bigger drops." As part of the "On My Own" science series from Millbrook Press, this book will suffice to teach youngsters about the water cycle at a basic level. The nonfiction book is enhanced with a glossary and fun facts section. Links to various books and websites are provided.