Candy floss is sugar that is spun with air. It is also called cotton candy or fairy floss. It is spun in machines. When spun, a small amount of sugar creates a much larger serving of candy floss. This is because it is mostly air. It is usually served on a stick or in a bag. Food colouring is sometimes used to change the natural white colour. Flavour is also sometimes added. Candy floss is often sold at fairs or circuses.