FunBrain - Fun games for kids grades K-8. Resources for parents and teachers too.
Poptropica - Virtual world for kids, play games, and chat safely.
NASA Kids Club - Online games and space information.
Virtual Solar System - Interactive presentation by National Geographic.
Dinosaur Egg Museum - Learn about dinosaurs. Interactive downloads.
Wikipedia - You could learn just about anything from this encylopedia. That's kind of fun, right?
DollDivine.com - If you like dress-up games, you'll dig this site.
RainbowDressup.com - Lots of dress-up and cooking games for kids.