Zoom, by kids, for kids! http://pbskids.org/zoom/
A Game a Day http://www.agameaday.com/
Chess http://www.chesskids.com/
Comics http://www.unitedmedia.com/comics/
Daily Sudoku http://www.dailysudoku.com/sudoku/index.shtml
It's My Life--Website for Teens
Drawing, movie making program for kids KerPoof!
interactive collection of science experiments, games and activities Kinectic City