It’s pretty easy, and fun to do.. also, very cheap.
What do you need?
Two Disposable Cameras
Tape both Cameras like this photo:
(one of them should be upside-down)
Since the lenses are about 4 inches apart and human eyes are usually 2.5 to 3 inches apart, the 3D effect won’t be perfect. And besides, it’s a disposable camera, so treat it as a toy and just have a good time.
Having subjects in the foreground and the background will show more of the 3D effect.
Just like any good 3D horror movie, the best shots show something coming out of the picture at you.
Remember that the cameras won’t focus closer than about three feet.
If you need to use flash, turn on the flashes for both cameras and expect things to come out a little weird.