Yahoo! Education (http://www.yahooligans.com/)
Featuring comprehensive safe surfing, games, homework help, and many kid friendly activities. 

The Crayola Home Page (http://www.crayola.com/)
C'mon - you know you love crayons!

Playhouse Disney (http://www.playhousedisney.com)
This is Disney's site for younger children - Bear in the Big Blue House, Stanley, Pooh and more!

Nickelodeon Online at Nick.com (http://www.nick.com/)
Nickelodeon TV stuff, hot games, cool jokes and celebrity gossip.

Sesame Workshop (http://www.sesameworkshop.org/sesamestreet/)
Sesame Street games, stories and educational activities for parents and their preschoolers.

PBS Kids (http://www.pbskids.org/)
Send electronic postcards, print coloring pages, answer riddles, play games...