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Two children meet Curious Cat, an animated cat who asks them if they would like to find out how glass is made. They take a trip to a glass making factory and to start learn about the raw materials used to make it, such as sand, soda ash and limestone. The different stages and processes involved in making a flat pane of glass are seen, including the 'float glass process', which makes the molten glass flat and smooth. This is demonstrated in a laboratory using oil and water. The children watch the raw material go in and the glass come out after which it is cut into different sizes.