So imagine you have a toy hammer that you like to play with. Well, a ball-peen hammer is kind of like a grown-up version of that toy hammer.
The ball-peen hammer is a tool that looks like a hammer with a metal head and a long handle. The head of the hammer has two sides - one side is flat and the other side has a round ball shape at the end. When you hit things with this hammer, the flat side of the head can flatten things out or push things down, and the ball side can shape things and make little dents.
This type of hammer is used for lots of different kinds of jobs, like bending metal, shaping it, and making it look nice. It's also used by blacksmiths and metalworkers who need to add texture or marks to their projects.
So, if you ever want to fix things or make cool metal things like swords or tools, a ball-peen hammer is a great tool to have in your toolbox!