Animals

DinoDictionary
eNature
Kid's Planet
Healthy Pet
Kids - National Wildlife Federation

Fun

Crayola.com
Harry Potter
KidsCom
Nickelodeon
Nick Jr.
Sesame Street
Yuckiest Site on the Internet

General Reference and Homework Help

4kids.org
AplusMath
America's Story
Ask Jeeves for Kids
B.J. Pinchbeck's Homework Helper
Insects.org
Factmonster
Internet Public Library
KidInfo
Today in History
World Fact Book