Bronze is a type of metal that is made by mixing copper and tin together. It was discovered a long time ago by people who lived a really long time ago, like your great-great-great-great-great-great-great-grandparents. They found that if they melted copper and tin together and let it cool down, it became a new kind of metal that was stronger and harder than just copper or tin alone.
Bronze is really useful because it doesn't break easily and it can be shaped into all different kinds of things like tools, weapons, and sculptures. In fact, a lot of important historical artifacts and statues are made out of bronze!
Nowadays, we don't use bronze as much as we used to because we have other metals that are even stronger and more durable. But, bronze is still really special because it has a unique color that looks kind of like gold but not as shiny. So, whenever you see a big, shiny statue outside, there's a good chance it might be made out of bronze!