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Leaf-Shaped Thermometer Changes Color With Temperature

Leaf-Shaped Thermometer Changes Color With Temperature

Hideyuki Kumagai's design is made of paper that turns green if it's warm, yellow if it's hot, and brown if it's cold.

Emma Hutchings

Japanese designer Hideyuki Kumagai has created a paper, leaf-shaped thermometer that changes color depending on the temperature. The ‘Leaf‘ stays a natural green color if it’s warm, turns brown if it gets cold, and turns yellow if it becomes hot.

Thermometer Is A Leaf That Changes Color With Temperature

The nature-mimicking device also has a small seal on the back so you can attach it to surfaces or objects in your home or office. The thermometer is available in either a pack of five large leaves (2.6 x 6.6″) or eight smaller ones (1.7 x 4.4″) for $36.

Leaf thermometer

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