Free Piano Resourceshttp://www.gmajormusictheory.org/Freebies/freebies.html
A great resource for free piano sheet music of various levels and genres.

Making Music Funhttp://makingmusicfun.net/htm/printit_piano_sheet_music_index.htm
Link to free piano sheet music.

Mozart Factshttp://www.classicsforkids.com/composers/bio.asp?id=36
Check out Fun Facts about Mozart. You might also read up on other composers, too. You never know which one might be the Spotlight Composer.

Music Tech Teacher Gameshttp://www.musictechteacher.com
Link to fun music games.

Music Theoryhttp://www.musictheory.net
Link to test your music theory skills.

Quavers Marvelous World of Musichttp://www.quavermusic.com
Link to a fun site full of music games and composing areas.

Wolfie Piano Apphttp://www.wolfiepiano.com
If you have an iPad, try this app for 30 days free. It's a great way to find classical music on your level and record yourself playing.