Pop Rocks are a delicious sugar based candy with a unique twist. Pour the sachet into your mouth and enjoy the crackling sensation as the candy explodes in your mouth! Both tasty and extremely fun! The amazing effect is achieved by trapping carbon dioxide gas in the hard candy, which is under pressure to get out. Once the candy starts to dissolve, this happens in explosive bursts. As the candy likes to soak up water, if you don't want to eat the whole pack at once you should fold the sachet over as soon as possible, thus limiting its exposure to the air. Otherwise it will begin to crackle in the packet and end up sticking together!