Audience: Students; Grades: 4-5; Subject: Science. (2004) Explains that water is vital to living things. Asks where water comes from, the forms it takes, and how it changes from one form to another. Explains that a single drop of water may be thousands of years old. From this point, provides a close look at the water cycle and the ways water changes from one form to another. Questions throughout the program motivate children to integrate their own observations with the concepts being taught. For the teacher's guide go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLfRUsyMi1iRFdiMEU&usp=sharing