Let's talk about folk legends and cultural mythical characters. By this I mean entities that we make up to embellish particular holidays or seasons, or to make some things more explainable to ourselves or to children. For example, someone took the story of an old Christian saint, St. Nicolas, and used it as the inspiration for creating the Santa Claus character that we use to embellish celebration of the Christmas season, especially for the sake of the children. Another example is the stork. In American culture, when small children ask their parents where babies come from, many Americans tell their children that the stork brings them.
Some stork supposedly comes flying in, carrying a baby, and delivers it to the new parents.
This legend is referred to in some children's cartoons. We can talk today and subsequently about folk lore figures like Santa, the Tooth Fairy, the Easter Bunny, Mother Goose, Jack Frost, the Sandman, the Grim Reaper, etc. This is a personification of cold weather or frost that comes with the cold and appears on windows. This is because on wintry days, beautiful and artistic frost patterns appear on our windows. This motif also appears in some cartoons and popular songs.