5 links
EO Library: The Water Cycle
earthobservatory.nasa.gov
From NASA, a history of water on earth and a look at some of the space missions involving water.
The Water Cycle
kidzone.ws
Fun facts about the water cycle and weather. Includes photos, activities, and printable worksheets.
The Water Cycle: Introduction
mbgnet.mobot.org
Includes cloud formation and vocabulary related to the things that happen to water during the cycle.
Water: A Never-Ending Story
-k12.atmos.washington.edu
Put together by three schools in Seattle, WA. Includes a look at the water cycle, weather phenomena involving water, and games.