A token coin is like a special kind of money that you can only use in one specific place or for one specific purpose. Imagine you have a token coin for a game arcade. You can't use this token coin to buy groceries or toys, but you can use it in the game arcade to play games.
Similarly, in the real world, token coins can be used in different places for different reasons. Some token coins are used in amusement parks, where they allow people to ride rides, play games, and buy food. Other token coins can be used in public transport systems, where they allow people to ride the subway or the bus.
Sometimes, token coins are used instead of regular money because they are easier to use. They are usually smaller and lighter, and they can be stored in a special card or a mobile phone app. Token coins can also be used as a reward system, where people get them for doing something good or completing a task, and then they can use them to get a prize or a discount.
So, that's what a token coin is, a special kind of money that you can only use in certain places for certain things, and it can be easier and more fun than regular money.