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/
http://www.starfall.com
Math activities http://www.coolmath4kids.com
literacy activities http://web.mac.com/donna.glynn/Kinderglynn/Scott_Foresman_Home_Page.html
Various activities for different subject matters http://classroom.jc-schools.net/waltkek/Kindergarten.html