Ok. Here's something I saw on the 'net and rather than just post a link I decided to try it myself. Here are the directions:
1) Sit comfortably back from the screen (no need to stick your face in the monitor)
2) Cross your eyes so that the 2 photos become 4 then slowly cross/uncross your eyes until the two images in the middle become a single image and overlap
3) Voila! 3D! Enjoy.
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