Imagine you and your friends are playing with a toy. Everyone wants to play with it, but there is only one toy. You can't just take the toy and play with it for hours because that's not fair, and your friends would get upset. Instead, you and your friends agree to share the toy. This means that each of you gets a turn to play with the toy, and when your turn is over, you give it to the next person.
This is kind of like a common pool resource. A common pool resource is something that lots of people want to use, but there is a limited amount of it. This could be something in nature, like a lake or a forest, or it could be something man-made, like a public park or a library.
Just like with the toy, people need to agree to share the common pool resource fairly. There are a few different ways they could do this, but one common way is by setting rules. For example, if lots of people want to fish in a lake, they might agree that only a certain number of fish can be caught each day. This way, everyone has a chance to catch fish and enjoy the lake.
But even with rules, it can be hard to make sure that everyone is following them. Some people might try to take more than their fair share of the resource, or they might ignore the rules altogether. This is why it's important to have someone in charge of making sure everyone is following the rules.
So, a common pool resource is something that lots of people want to use, but there is a limited amount of it. People need to agree to share it fairly and follow the rules to make sure everyone can use it. And just like with the toy, it's important to have someone in charge to make sure everyone is playing fair.