(Sample link) White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
(Sample link) Fun activities - by girls....for girls. http://www.missoandfriends.com/
Beginning Reading Link http://www.starfall.com
Math/Reading/L.Arts All ages http://www.funbrain.com
Primary Games has a lot of math games that will reinforce basic math skills. http://www.primarygames.com