What is pop rock doing in the hotel?

? It's for children. This kind of sugar will jump in the mouth because of the dissolution of saliva, so it is called pop rocks. The history of sugar production has roughly experienced three stages: early sugar production, manual sugar production and mechanized sugar production.

Sugar:

Sugar is a polyhydroxy (two or more) aldehyde or ketone, which can become one of the organic compounds after hydrolysis. Chemically, because it is composed of carbon, hydrogen and oxygen, similar to the polymerization of carbon and water in the chemical formula, it is also called carbohydrate. Prehistoric humans have known to ingest sweet food from fresh fruits, honey and plants. Later, it was developed to make maltose from grains, and then to make sugar from sugarcane beets.