Cool Links:

NASA Kids
http://kids.msfc.nasa.gov/

Try Science
http://www.tryscience.org/

Robert Krampf's "Experiment of the Week"
http://www.krampf.com/news.html

The Yuckiest Site on the Internet
http://yucky.kids.discovery.com/body/

Kids Health
http://www.kidshealth.org/kid/

Kid Concoctions
http://www.kidconcoctions.com

Sheep Brain Dissection
http://exploratorium.edu/memory/braindissection/index.html

Virtual Body
http://www.medtropolis.com/Vbody.asp