White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Fun activities - by girls....for girls. http://www.missoandfriends.com/
Great activities and the words to many of Dr. Jean's songs http://www.drjean.org
Lots of cool math activities http://www.coolmath.com
Play games and read stories with Clifford the Big Red Dog. http://www.scholastic.com/clifford/play/index.html
Neuroscience for Kids http://www.faculty.washington.edu