Okay kiddo, do you know what a flag is? It's like a big piece of cloth that has special colors and pictures on it that can represent a place or a group of people.
Now, the Brussels-Capital Region is a special place in Belgium where the capital city of Brussels is located. And just like many other places, it has its own flag too!
The flag of the Brussels-Capital Region has three vertical stripes of equal size - blue on the left, white in the middle, and red on the right. These colors are actually the same colors as the Belgian flag, which makes sense since Brussels is located in Belgium!
The stripes also have a special meaning. The blue represents the European Union, which has its headquarters in Brussels. The white represents peace, since the city has often been a place of peace negotiations. And the red represents the bravery and power of the people who live there.
So in short, the Brussels-Capital Region flag is a special piece of cloth with blue, white, and red stripes that represents the capital city of Belgium and the bravery and power of its people.