Droplet and the Watercycle
This is a cool interactive activity on the water cycle for school age children. My student loved to work on it when they finished their other tasks.
US EPA- Thirsten Water Cycle:
This is a wonderful interactive picture of how the water cycle works.
Water Cycle in Action
This would be a great tool for teacher at school or at home. Students could tell the class what they see happening in different parts of the flash picture.