A foundation is like a group of people who want to help others. They have extra money or things that they can give away to make the world a better place.
But they want to make sure that the help they give goes to the right places and people who really need it. So they make a plan, like a map, of how they will use the money or things they have to help others.
They also have rules to follow, like only giving help to certain kinds of people or only using the money for certain things. This helps them make sure that they are doing the right thing and not wasting their resources.
In a way, a foundation is like a superhero team that wants to use their powers for good and help the world become a better place!