i cant do it. :(
i cant cross my eyes god damnit
You can do it without crossing your eyes.
Hold your hands up in front of your face, palms away from you, with a gap in between. The idea is to hide the right half of the image from your right eye so only your left eye can see it, and hide the left half of the image from your left eye so only your right eye can see it. You'll be left with a single 3D image in the middle.