Just For Fun
Girl Zone
http://www.girlzone.com
SmartGirl
A great site for sharing your ideas, taking surveys, and submitting your poetry and/or prose. This site has lots of options. Boys are invited too.
http://www.smartgirl.org/
Puzzlemaker
http://puzzlemaker.com
The Red Studio
The Red Studio is a project from the Museum of Modern Art. They've collected interviews with artists, designs for future automobiles and an exhibit of Alfred Hitchcock's life and work and much more. But my absolute favorite area is the e-card page. You can send art to your friends for free!
http://redstudio.moma.org/
Teen People
http://www.teenpeople.com
To Fly is Everything
What a site! Watch incredible vintage films of early flight and fly the 1904 Wright Simulator!
http://invention.psychology.msstate.edu/
When Science and Photography meet
Ever wanted to get an up close and personal view of a termite or a Praying Mantis? Then you've come to right place. Dennis Kunkel is a photomicrographer who specializes in bugs. Be sure and click on "Most Wanted Bugs."
http://www.denniskunkel.com/PublicHtml/Edu-Splash.asp
Young Composers
http://www.youngcomposers.com