this website has simple, but fun games. Also, it has resources for teachers and you can save them to your Diigo account and print them out later(puzzles, word finds, charts, etc....).
Game Central - Discovery.com. One of the most intriguing stations on television brings a host of varied gaming opportunities to youngsters of all ages.
This is a game-based learning initiative by NASA. The site links to numerous related and supplementary resources. The game is downloadable (free) but unfortunately PC-only.
Here's a link to a Youtube video showing gameplay and audio:
http://www.youtube.com/watch?v=cmAGNTzpINE&feature=related
Description: In Moonbase Alpha, you assume the exciting role of an astronaut working to further human expansion and research. Returning from a research expedition, you witness a meteorite impact that cripples the life support capability of the settlement. With precious minutes ticking away, you and your team must repair and replace equipment in order to restore the oxygen production to the settlement.
Games kids in grade pre-k through adult can play. However, most are geared toward elementary grades. It also has activity pages that can be printed for use in the classroom. d_3, gl_E, ev_4, y_f2