"The Frog Prince; or, Iron Henry" is a fairy tale

Fairy tale

A fairy tale is a type of short story that typically features such folkloric characters, such as fairies, goblins, elves, trolls, dwarves, giants or gnomes, and usually magic or enchantments. However, only a small number of the stories refer to fairies...

, best known through the Brothers Grimm

Brothers Grimm

The Brothers Grimm , Jacob Grimm and Wilhelm Grimm , were German academics, linguists, cultural researchers, and authors who collected folklore and published several collections of it as Grimm's Fairy Tales, which became very popular...

's written version; traditionally it is the first story in their collection. In the tale, a spoiled princess reluctantly befriends a frog

Frog

Frogs are amphibians in the order Anura , formerly referred to as Salientia . Most frogs are characterized by a short body, webbed digits , protruding eyes and the absence of a tail...

 (possibly meeting him after dropping a gold ball into his pond), who magically transforms

Shapeshifting

Shapeshifting is a common theme in mythology, folklore, and fairy tales. It is also found in epic poems, science fiction literature, fantasy literature, children's literature, Shakespearean comedy, ballet, film, television, comics, and video games...

 into a handsome prince. Although in modern versions the transformation is invariably triggered by the princess kissing the frog, in the original Grimm version of the story the frog's spell was broken when the princess threw it against a wall in disgust.