6 months & up. These books give a new spin on traditional nursery rhymes. Set of 6 books. Paperback. 6 pages each. Features: Soft and paper-like, Chew proof, Rip proof, Non-toxic, and Dishwasher and washing machine safe! Book Titles include: Humpy Dumpty, Frere Jacques, Hickory Dickory Dock, Old MacDonald Had A Farm, Mary Had A Little Lamb, and Hey Diddle Diddle.