In the past flags were first made out of wood then they were made out of metal. People flew flags in faraway China over 4,000 years ago. Most people fly there own country flag when they go on a war or visiting.
The Olympics has there own flag with Five Rings and Five Colours. Each ring represents a continent.It means that people from five continents like Africa, Asia, Europe, North America, and South America – come to play.
Railway flags tell the trains what to do. For Example, a red flag tells the train to stop and a blue flag on the side of a train means someone is working on the train. It means nobody can move the train.
