Scholastic: The Stacks

http://www.scholastic.com/kids/stacks/

Games, author information, and activities based on favorite kids' books — including Magic School Bus, Clifford, Goosebumps, Captain Underpants, Harry Potter, I Spy, and The Babysitters Club. They also offer a community for older students called "The Scene" with message boards, favorite reads, widgets, and more.