This is one of the neatest things I have ever seen. At first glance, it looks like a simple cabinet, perhaps from a grocery store. Nothing fancy there. However, if curiosity gets the better of you, and you put your hand in the empty space inside it, it plays music! So what can this be?
An Infrared Harp! It has infrared light beams running up and down across the harp. When your interrupt the beam, the computer senses this and causes music to play. Of course infrared light is not visible to humans, so we see an empty cabinet. There are high and low notes to play with as well. I couldn't stay away from this at the science museum, it was my absolute favorite thing ever!
Chela
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