Candy that changes color is a fun treat that can surprise and delight those who eat it. This type of candy often uses special ingredients that react to temperature, moisture, or pH levels. For example, some candies may change color when they are exposed to heat from your mouth or when they dissolve in saliva. These colorful candies can come in various forms, such as gummies or hard candies. They are popular among children and are often used at parties or events to add an element of excitement. Brands like Skittles and M&M's have also experimented with color-changing features in their products.