How Stuff Works - Great site! Find out how engines,
cell phones, and lots of other stuff works.
Ology- An introduction to many branches of science such as geology, astronomy, genetics, marine biology, and paleontology. Click on the Stuff to Do links to find activities. This site is by the American Museum of Natural History.
Biology4Kids - This site has information on plants, animals,
cells, and microorganisms.
Geography4Kids - Information about the earth - the structure, atmosphere, biosphere, ecosystems and much more.
Science Buddies - You can take tests here to help you find out what kind of project you would be really interested in doing. Science Buddies then give you some ideas for projects. There are also lots of projects given, so you do not have to take the tests if you already know what you want to do.