Water Water Water for Kids http://www.epa.gov/kids/water.htm
Science Fair Studio http://school.discovery.com/sciencefaircentral/scifairstudio/ideas.html#water
Droplet and the Water Cycle http://kids.earth.nasa.gov/games/
Water in The City http://www.fi.edu/city/water/
NH Project W.E.T. http://www.des.state.nh.us/wet/