Watching the Olympics ... in 3D
I had ordered some 3D glasses for a very old TV show, based on the Pulfrich effect, in fact the show mentioned on that site, Doctor Who. I found a place online selling them for only 99 cents each, called Science Stuff. The cool thing is that they are great for sports with a lot of motion (like skiing, or what happens to be on the Olympic coverage now, replay of Figure Skating. The principle is that by tinting one side, you're slightly slowing the light hitting your eye, causing your brain to percieve 3D. There's the normal sensation with 3D glasses after you take them off, where your eyes feel wierd seeing the same amount of light in both eyes again!