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/
Starfall-Great alphabet and reading site. One of my favorites! http://www.starfall.com
Crayola kids http://www.crayolakids.com
Funschool http://www.funschool.com
Great reviews for grades k-3 http://www.abcya.com