Ice was the solid state of matter of water. It was created by freezing water at 32 degrees Fahrenheit (0 degrees Celsius).

Several patches of ice were used as booby traps by Kevin McCallister and Finn Baxter.

In Kevin's case, he doused the outdoor stairs to his home in water, which then froze into ice in the night and caused Harry Lyme and Marv Murchins to slip and fall multiple times when they tried to invade his home. One year later in New York City, Kevin himself would slip and fall on a patch of ice while luring the criminals to Central Park.

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