merry-go-round

n. Any revolving contrivance for affording amusement; esp., a group of seats in the shape of hobbyhorses or other fanciful animals, arranged in a circle on a platform that is rotated by a mechanical drive, often to the accompaniment of music; the seats often move up and down in synchrony with the rotation; -- called also carousel. It is employed primarily for the amusement of children, and is typically found at an amusement park. [ 1913 Webster ]