"Sunlight is recommended, but a flashlight, a spot light, even a mag light is a good light source to view your Superman Skydisc in all its full brilliance. This state-of-the-art technology allows you to witness the Man of Steel as he's never been seen before. By holding your Superman Skydisc flat (horizontally) under direct light and slowly turning the image, Superman comes alive. Side views, rear view, front view, overhead view; you have Superman in your hands for a full 360 degrees! Remember - hold flat in sunlight, turn slowly, and watch the Man of Steel emerge before your eyes." *Source: Card Back