Wikipedia: water portal.All the information about water in the Wkipedia organized in one single place, with links, news, ideas and more. Also check the "Category:Water" link in the "Categories" section to access all the articles in the Wikipedia related to water.
Interactive questions and answers game.A flash animated game with 25 questions about water. You have to choose from three possible answers, and the game lets you know instantly if you have the right answer.
The Water in the Earth
The Hydrosphere in Geography4kids.com.Freshwater, groundwater, seawater, aquatic biomes and more.
The Water Cycle
Interactive water cycle.A flash animated activity that lets you control the water cycle as you learn.
The great oceanic conveyor belt.A very clear introduction to how marine currents work.
The Molecule of Water
5 really weird things about water.The most important molecule for Life is also the one that displays the most strange behaviour and properties. Learn about some of them.