carousel: a large, rotating machine with seats for children to ride or amusement
ride: a mechanical device that you ride for amusement or excitement
polypodiaceae: ferns: a large family that in some classification systems has been subdivided into several families (including Aspleniaceae and Blechnaceae and Davalliaceae and Dennstaedtiaceae and Dryopteridaceae and Oleandraceae and Pteridaceae)