Okay kiddo, have you ever played a game with your friends where you all vote on what you want to play or where to go? That's kind of like a republic. You see, a republic is a type of government where people get a say in how things are decided.
A long time ago, in ancient Greece, there was a very famous writer and philosopher named Plato. He wrote a book called "The Republic" where he talked about his ideas for what the best kind of republic would be like.
In this republic, there would be a group of people who were really smart and wise called the "philosopher-kings." They would be in charge and make decisions for everyone else. The idea was that if you let everyone vote on every little thing, it would be chaos and nothing would ever get done. So, the philosopher-kings were put in charge to make sure everything was fair and just.
Plato also talked about how in this republic, everyone would have a certain job they were good at and they would stick to that job. The idea was that if everyone did what they were good at, then everything would run smoothly and people would be happy.
So, that's basically what a republic according to Plato is like. It's a type of government where people get to have a say in things, but there are also wise leaders who make sure everything runs smoothly. And everyone has a job they're good at so that everything gets done the right way.