Hi, kiddo! Today we're going to talk about something called "brass model". A brass model is basically a miniature version of something made of a metal called brass.
You know how you have toys like cars and trains that you play with? Well, brass models are like very special and detailed versions of those toys. They are made by grown-ups who are really good at making things and pay attention to every little detail.
People collect brass models because they look really cool and are like having a special toy that you can't really play with - it's more like something you look at and admire. They can cost a lot of money because they take a long time to make and are very unique.
So, in summary, a brass model is a little metal toy that is very detailed and cool to look at, but not really something you can play with.