The term 'Elephant of Children's Literature' refers to the character Babar, a five-letter word. Babar is a fictional elephant created by Jean de Brunhoff in 1931. He is the protagonist of a series of French children's books and is one of the most recognizable characters in children's literature. The stories follow the adventures of Babar as he leaves the jungle, visits a big city, and eventually becomes King of the Elephants. The stories are known for their positive messages about family, friendship, and loyalty.