The Snowflake: A Water Cycle Story by Neil Waldman (Millbrook Press, 2003). Over the course of a year, a single snowflake embarks on a unique journey, and Waldman’s book gives its story month-by-month.
Through the journey, readers learn about water sinking into the Earth, water emerging in a mountain spring, water used for irrigation pipes, evaporation into a foggy sky, water through a thunderstorm, water passing through a fish, and many, many pipes. In the end, the water in a droplet once again falls as a snowflake onto a frozen mountain peak.
The month-by-month story reinforces the cyclical nature of the water cycle: just as time on a calendar passes in a circle, so too does water in its many forms.