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Fickle Foam is a 4x4 inch square foam-backed pad that is heat sensitive. This is the highest quality "glossy black" version. The warmth of your hands causes the color changing phenomenon of the of liquid crystals to scatter different wave lengths of light as the temperature changes through the preselected temperature range. You can make all kinds of different designs on the pad depending on how warm your hand and fingers are.
Incredible Science Fun Learning Ideas:
Liquid crystals that are sensitive to temperature (such as in Fickle Foam) are called thermotropic liquid crystals. They have molecules arranged like a spiral staircase (helix).
As the temperature changes, the liquid crystal assumes a different molecular organization. As a result, the interaction with light changes and causes the color to change.
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