Hey kiddo! So, you know how we use paper and metal coins as money? Well, a long time ago, people used to use something called leather currency. Leather is like the material that our shoes and belts are made of.
Basically, people would take a piece of leather and cut it into a certain shape and size, and then they would stamp a picture or design on it to show that it was worth a certain amount of money. Just like how a $1 bill has a picture of George Washington on it.
People used leather currency because it was durable and could last a long time. Plus, it was harder to counterfeit because it was difficult to replicate the designs on the leather.
However, as time went on, paper money became more popular because it was easier to carry around and store. So, people don't use leather currency anymore, but it was an interesting way that people used to pay for things!