Key Features :
i : These playful rollers will delight children as they sing along to the rhymes they create.ii : At the same time they will develop important early language and fine motor skills.iii : The six much-loved rhymes include: Twinkle, Twinkle Little Star, Hickory Dickory Dock, Humpty Dumpty, Itsy Bitsy Spider, Five Little Speckled Frogs, and The Wheels on the Bus.iv : Set contains six rollers measuring approximately 2-3/4" x 1-3/8 ".v : Safe for 2+.