These Disney Pixar Cars Color Changers are awesome, when you dip them in cold water, they change color, and to return them to normal color, just dip them in warm water. Just so you know, cool tap water was not cold enough to activate the change, but a bowl of ice in water worked fantastic. Warm water did well for changing the color back to its original paint job. These small toy cars come set to their warm color of body paint. Kids can dunk them in icy cold water, and cars will change their color to cold color. The car then stays that color until its dipped in warm water. Kids can change the cars back and forth indefinitely, and the bodies of the cars are made of plastic, so they will never rust. Children ages 3 and up should have no trouble mastering the ability to change the paint jobs on these cars back and forth with water. In fact once they get started, it may be difficult to get them to stop. If a parent is willing to spread some towels out and give kids access to a bowl or two of water, children can amuse themselves for hours!!! . \r
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