Since the vast majority of the audience for "Spy Kid 3D: Game Over" has probably never seen a 3D movie with cheap, old-fashioned blue-and-red-lensed cardboard glasses, here's a three-point primer for proper enjoyment of any flick in this format:

1) Sit toward the middle of the theater. Because of the twin-image nature of 3D projection, the more off-center you are from the screen, the more you'll see eye-straining "ghosting" of images through your glasses instead of proper depth of field.

2) The left lens (red) always seems uncomfortably darker than the right (blue). Get used to it.

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