A coat of arms is like a special picture that people use to show their family. It's like a special way of saying "this is my family and we're important."
The picture has different parts that are called symbols. These symbols usually have a special meaning, like a lion might mean that the family is brave. Other symbols might show where the family comes from or what they do for a living.
A coat of arms is usually made up of different shapes and colors, like a shield with different stripes or shapes on it. Sometimes, there might be a crown on top of the shield to show that the family is really special.
People with a coat of arms usually use it on things like flags, clothes, and even buildings to show that they're proud of their family and where they come from. It's like a very special way of showing off who you are!