Water Facts and Information
Here's a raft of interesting water facts and trivia, including specifically about water qualities, water and health, water use, water pollution, and water as a raw material.
SeaWorld has devised a simple "Weight of Water" classroom activity. In the end, kids realize that saltwater is heavier than fresh water. It's easy to do; kids use a wide-mouth pint jar, a fresh egg, large serving spoons and water.
Camp Brain, since 1994, has been a great resource for and by camp people. Here are 18 water games.
Lots of great ideas for a backyard splash party, birthday or not.
MIT: Surface Tension
MIT's introduction to water surface tension with a video of a boat powered by surface tension and some other practical experiences.