Okay kiddo, let me explain what the Odrysian Kingdom is in a way that you can understand.
A very long time ago, there was a group of people who lived in a place called Thrace. They were called the Odrysians. They were a special kind of people because they formed a big kingdom together, like a really big club that they all belonged to.
The Odrysians were ruled by a king, just like a school is ruled by a principal. The king of the Odrysians was super important because he made all the decisions for their kingdom.
The Odrysians were very brave warriors and knew how to fight with swords and spears really well. They were very strong and could protect their kingdom from enemies.
The Odrysian Kingdom was so big that it covered many different lands, like a giant puzzle with many pieces. They had big cities and small villages, and everyone who lived in them worked together to make their kingdom strong and happy.
The Odrysians were also very skilled at trading with other countries, which means they would exchange things they had for things they needed. They were known for their beautiful jewelry and metalwork and would trade these things for food and other goods.
The Odrysian Kingdom was very important in its time because it helped keep peace in Thrace and made sure everyone was happy and safe. It's a bit like how your family takes care of you and your siblings to make sure everyone is happy and healthy.