there are two different kinds of money: coins and paper money. the coin in made of metal, and stamped so that people know much it is worth . different types of money are worth different amounts. people around the world used many different things for currency, but eventually metal coins became the most popular form of money in most of europe and asia. people used gold , silver and copper as money because it was pretty,and useful, and hard to get . the first metal money was in lumps and bars, and how much it was worth depended on how much it weighed. this wasn't very convenient, because if someone only wanted to spend part of their money, they had to melt down the metal to divide it up.