$8.00 Fisher-Price Brilliant Basics Nursery Rhyme Keys-6M+. 3 Sing-along nursery rhymes! Classic play to enrich baby's development. Easy-press button starts songs. Rattle. Slide. Spin. Babies love to play with keys - and this set opens up a world of fun while encouraging fine motor skills. Busy activities and three sing-along nursery rhymes! Old MacDonald; Hey Diddle Diddle; Hickory Dickory Dock