Configuration design is like building with blocks, but you get to pick which blocks you want to use and how they fit together. Think of your toy blocks: there are different shapes, sizes, and colors, right? Configuration design is like choosing which blocks to use and how to put them together to make something that works for you.
For grown-ups, this means choosing what features you want in something like a computer or a car, and how you want those features to work together. It's like choosing what pieces you want to build with, and then putting them in the right place so they do what you want them to do.
For example, if you were designing a car, you might choose a big engine and sporty wheels to make it go fast, but you might also choose a comfortable seat and air conditioning to make it a nice place to be. You would have to figure out the best way to fit all those things together so that they work well as a car.
Configuration design is like a puzzle, but instead of having to solve a pre-set puzzle, you get to make your own puzzle with your own rules. It's all about choosing what you want and figuring out how to make it work together.