Kids Only

Unschool - An Australian children's ezine featuring poetry, short stories, pictures, book and movie reviews, games, and articles.
http://unschoolkidz.beverleypaine.com/

KidPub - Publish a story, read stories written by other kids, and help write the never-ending story. Includes questions and answers, archives, and forum. [Forum requires paid membership to post.]
http://www.kidpub.com/

Write Me a Story - Provides a weekly story starter, then randomly selects five pieces to feature on the web.
http://www.kidscom.com/create/write/write.html

Kids Haven - Publishes prose and poetry written by kids for kids.
http://pages.sssnet.com/ohiobar/kids.html

Kids Bookshelf - Publishes children's stories and drawings as well as class projects. Offers monthly contests and drawings for prizes. Also has children's book reviews.
http://www.kidsbookshelf.com/

Fun-4-Children - Poems, riddles, stories, jokes, riddles, and comics written for and by children.
http://www.fun4children.com/

Kid Stories - Created by and for kids. Publish stories online.
http://www.angelfire.com/ut2/kidstories/htmlks.html