So, you know how when you play a game and you have to guess the name of a place or a city? Well, Serbia is a country and it has a capital city. A capital city is like the big boss city of the country. The capital city of Serbia is called Belgrade! That's where all the important people of Serbia work and live. It's like the king or queen's castle in a fairy tale. In Belgrade, there are lots of tall buildings, fancy restaurants, cool museums, and parks where you can play. It's a really big city, and lots of people live there. So if someone asks you, "What's the capital of Serbia?" you can say, "Belgrade!"