http://stellarium.sourceforge.net/ Freeware planetarium software!
http://www.thespacereview.com/article/613/1 The real story behind NASA's special space pen, be sure to read this. It turns out NASA did not spend millions of dollars to design a pen that would work in space.
http://video.google.com/videoplay?docid=-162891478515007486# A bike travelling 100 mph down a mountain breaks.
http://www.yarukinoki.net/flash/pendulumeca/ Crazy game, click and hold on dark bars at top of screen to swing your robot.
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