There are many interactive exhibits. This is a photoluminescent wall. Opposite, are bright lights on a timer. Push a button, the lights come on for something like 30 seconds, then turn off, leaving the room in complete darkness except for the soft glow of the wall.
If one stands close to the wall when the lights are on, one's shadow is captured. The closer one stands, the sharper the image. Slowly move an arm, and it becomes ghostly. Fun for kids and parents too. Hand-held, but the wobble in my arms only adds to the overall effect.
We had fun playing with a display similar to that the Oregon Musuem of Science and Industry in Portland last year.
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