Pop rock contains carbon dioxide. When carbon dioxide is put into the mouth, it will generate carbonic acid due to heating and adding water. Carbonic acid is heated to generate water+carbon dioxide, which circulates continuously, causing sugar to jump around until all carbon dioxide is exhaled from the mouth.
In addition, when making pop rocks, high-pressure carbon dioxide gas should be added to hot syrup. Carbon dioxide gas will form tiny high-pressure bubbles in sugar. When the pressure is released after the candy is cooled, the candy will break, but the fragments still contain high-pressure bubbles. When you put a piece of sugar in your mouth, the gas is released after the sugar melts. Do you hear it? Boom, boom? Sound.
Therefore, pop rock is deeply loved by children ... well, I like it too! o(？ _? ) o haha ~