Starfall is a great educational website with a variety of learning activities. http://www.starfall.com
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
(Sample link) Fun activities - by girls....for girls. http://www.missoandfriends.com/
Mrs. Perry's Hot List of Online games http://www.kn.att.com/wired/fil/pages/listtechnolgyp.html
With this great site you can make your own handwriting worksheets. http://www.handwritingworksheets.com/