Nighttime visitors are characters that appear in folklore and children's stories. The most well-known nighttime visitors are the Sandman and the Tooth Fairy. The Sandman is a mythical figure who sprinkles sand into the eyes of children to help them sleep. The Tooth Fairy is a magical creature who takes children's baby teeth in exchange for money or a small gift. Both of these characters have been popularized in literature, movies, and television shows.