computer graphics on the inner workings of the cell http://www.studiodaily.com/main/technique/tprojects/6850.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
The Periodic Table--Wonderful site! http://www.webelements.com/
Burke Museum Portal to a wealth of natural history information about the State of Washington http://www.washington.edu/burkemuseum/fieldguide/index.php