Mad Science Link! http://www.madsci.org
Science games http://www.tryscience.org/
Science News http://www.sciencenewsforkids.org
One fact a day......... http://www.scienceIQ.com/
Earth friendly site! http://tiki.oneworld.net/penguin/global_warming/climate_home.html
What makes the body work? Find out here! http://yucky.kids.discovery.com/noflash/body/index.html
Short cartoons of all the body systems! http://www.kidshealth.org/PageManager.jsp?lic=1&article_set=29673&ps=110
Try to place the organs in the body! http://www.sciencenetlinks.com/interactives/systems.html
The skeleton http://www.sad34.net/webquests/SkeletonQuest/