Magic School Bus http://www.scholastic.com/magicschoolbus/home.htm
Nasa Kids http://www.nasa.gov/audience/forkids/home/index.html
Cyber-Fair: Look at samples of student projects, find ideas for projects, and more... http://www.isd77.k12.mn.us/resources/cf/welcome.html
Discovery Kids http://www.discoverykids.com/
Rocks & Minerals: Great websites with loads of information, webquests and more http://edtech.kennesaw.edu/web/rocks.html