Thermochromic pigments are special materials that change color in response to temperature changes. These pigments can be found in various products, such as toys, clothing, and even packaging. When the temperature rises or falls, the pigments undergo a chemical reaction that alters their color, making them visually interesting and functional. These pigments are often used in applications like temperature-sensitive labels and heat-activated inks. They can help indicate temperature changes, providing useful information in various settings, such as food safety or personal comfort. The technology behind thermochromic pigments combines chemistry and design to create engaging and practical solutions.