Geo-Mysteries with Rex the Dino Detective Have fun learning about rocks and geology with Rex. Great graphics and animations. http://www.childrensmuseum.org/geomysteries/mysteries.html
Simple Machines Information on all types of simple machines. Diagrams, photos, and links to other sites. http://sln.fi.edu/qa97/spotlight3/spotlight3.html
National Geographic Kids Games, printouts, and lots of info about animals. http://www.nationalgeographic.com/kids/
All About butterflies http://www.enchantedlearning.com/subjects/butterflies/allabout/
ZoomDinosaurs.com Everything you ever wanted to know about Dinosaurs. http://www.enchantedlearning.com/subjects/dinosaurs/toc.shtml
Welcome to the Planets Beautiful photos and lots of info about the nine planets from NASA http://pds.jpl.nasa.gov/planets/welcome.htm
Ed Heads Interactive simple machine activities http://www.edheads.org/activities/simple-machines/