Games
Javanoid and Tetris
http://www.javanoid.com/

Games
Candy Stand
http://www.candystand.com/

Games and Puzzles from NASA
Space Pennant Puzzle : Six different puzzles!
STS-117 Memory Game: Match all the pairs and win!
STS-116 Picture Switcher: Can you solve the puzzle?
STS-115 Memory Game : Match all eight pairs and win!
Shuttle Tac Toe :Can you beat..
http://www.nasa.gov/audience/forkids/games/index.html

Lemonade Stand
Learn to Run a Business and Have a Lot of Fun and Lemonade!
http://www.lemonadegame.com/

Rock Climbing
Rock Climbing Equipment and Techniques: Free Climbing
http://alumnus.caltech.edu/~sedwards/climbing/

See What Movies are Playing Near You
Movies
http://movies.channel.aol.com/

Stick Ball
Rules and Basics of the Game
http://www.streetplay.com/stickball/introduction.shtml

Tic Tack Toe
Mars Tick Tack Toe from NASA
http://www.tsgc.utexas.edu/space_games/tictactoe/mars/ind...

Trivia
Lots of Fun
http://www.funtrivia.com/

USA at Night
Can you tell what US City from the sky at night?
http://observe.arc.nasa.gov/nasa/fun/at_night/usa.html