[whouweling]

What is cool: you can also see the 3D image without any aids; just by crossing your eyes while looking at the 2 images. This way you can see the tracking in action.

Their appears a 3th image in the middle which you need to focus on and on both sides a non-depth "ghost" image.

Takes a bit of practice! (Not sure if this is damaging to your eye sight; try at your own risk)

[rainforest]

I don't think you'll get the right effect, if you cross your eyes your left eye will see the image intended for the right eye (the lenses don't focus on the opposing image). Still seems to give some sense of depth, though.

[foobarian]

It's a sailboat!