Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term nursery rhyme is used for â€˜traditional'' songs for young children in Britain and many English speaking countries, but usage only dates from the nineteenth century and in North America the older â€˜Mother Goose Rhymes'' is still often used. The oldest children''s songs of which we have records are lullabies, intended to help a child sleep. Lullabies can be found in every human culture. The English term lullaby is thought to come from ''lu, lu'' or ''la la'' sound made by mothers or nurses to calm children, and ''by by'' or ''bye bye'', either another lulling sound, or a term for good night.