Kids on the Net -
http://kotn.ntu.ac.uk/
Kids' work accepted here, author tips, creative writing ideas,
and a teacher section.
Kids Online Magazine -
http://www.kidsonlinemagazine.com/
The magazine for kids and by kids. All work is accepted with
teacher or parental approval unless gives too much personal
information. There is a good teacher section with parental
permission forms available.
Mystery Net's Kids Mysteries:
http://kids.mysterynet.com/writing/
What a great resource for this genre - online participation in
solving mysteries; a teacher resource; and opportunities for
kids to submit their own mysteries.
Poetry for Kids:
http://www.poetry4kids.com
Ken Nesbitt's Home Page; definitely a fun place to be. Lots of
ideas, chances to submit poetry, online rhyming dictionary,
poetry games...