An impressive science experience for young children!

What is Chemistry? What do chemists study? What is the difference between a chemical and a physical change? What is a chemical reaction? What are acids and bases and how do they interact chemically? How do we know whether a substance is acid or base? How can we speed up a chemical reaction? How do we use it? What is combustion? Is it a chemical or a physical phenomenon? What do we need to start a fire? What is the role of oxygen in combustion? Where do we see chemistry in real life? How is technology affected by innovations in chemistry?