Nursery rhyme
traditional song or poem for children
A nursery rhyme is a traditional poem for young children. The term has been used since the 18th century or early 19th century. In North America, the term "Mother Goose rhymes", first used in the mid-18th century, is often used.
Some examples of English nursery rhymes are "Three Blind Mice", "Jack and Jill" , "Hey Diddle Diddle"and "Baa Baa Black Sheep."