Pop rocks are a very popular candy that is out on the market. Some people believe that a boy died from eating pop rocks and chugging some soda which is very untrue. That could not cause you to die what so ever. Then thing that makes pop rocks pop in your mouth is the carbon dioxide that is trapped in the candy. When the saliva dissolves then candy the carbon dioxide is released and it pops in your mouth. I never knew that pop rocks contain carbon dioxide just like soda although not as much. The pop rocks are not dangerous so I'm pretty sure that eating them is safe.