"Hogwarts was a very big and old castle," she began. "It was founded hundreds of years ago by four people, and their names were Godric Gryffindor, Helga Hufflepuff, Rowena Ravenclaw, and Salazar Slytherin. They had decided that magic was innate, yes, but it must also be taught, so they would form a school to teach magic so magical people could understand it better. They would put the students in four separate houses, and each one was named after one of the founders: Gryffindor, Hufflepuff, Ravenclaw, and Slytherin." 