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Home » EdTech » Electronics » Liquid Crystal Fun

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 -  Friday, November 02, 2007
Beautiful colors
Reviewed By: Mark (Saint Louis, Missouri)
The product description is wrong, these don't change color from the heat of your fingers, they change color based on pressure and point of view. If you have an LCD monitor and press on it, it displays a similar effect. When you press lightly on the back of the Touchstone, it changes colors around the point of pressure. They're one of the most entertaining pieces in my optical illusion collection.


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