Pop Rocks are a kind of candy with carbonation added to make a "popping" feeling in the mouth of the person eating them.
How do they pop?
The candy pops and fizzes because it contains bubbles of carbon dioxide under high pressure. When you melt the candy shell, the carbon dioxide escapes with a pop. When Pop Rocks® are made, the hot candysyrup is mixed with carbon dioxide gas under high pressure (600 pounds per square inch).
