White House for Kids
http://www.whitehouse.gov/kids/whlife/index.html

National Geographic for Kids
http://www.nationalgeographic.com/kids/

Disney Website
http://www.playhousedisney.com

PBS Website
http://www.pbskids.org

Sesame Street
http://www.sesamestreet.com

Starfall - a great site for everyone
http://www.starfall.com