Funschool - Hundreds of free games, puzzles and activities for grades K-6.
Miniclip - A variety of free games including sports, puzzle, and multi-player games.
Orisinal - 60 flash games created by artist Ferry Halim.
e-Learning for Kids - Children 5-12 build and improve math, science, reading, and computer skills.
Fun Brain - Games, web books and comics.
Guinness World Records - Search for your favorite Guinness records, or find something new.
National Geographic Kids - The online version of National Geographic Kids Magazine.
Dr. Seuss - Play games, write your own story, and learn all about Dr. Seuss.
Captain Underpants - Captain Underpants games and information about Dav Pilkey.
Roald Dahl - Roald Dahl information, news and fun.
Magic Tree House - The official Magic Tree House webpage.
Harry Potter - Harry Potter games, information and downloads.
Guys Read - Book lists, and a book finder tool to help guys find good books.
Warriors - News and information about the Warrior Cats series.
Percy Jackson - News and information on the Percy Jackson series.
Kids Read - Books reviews, series order, books made into movies -- it's all here.