Indestructibles ® are books that babies can really sink their teeth into! They're chew proof, rip proof, nontoxic, and 100% washable. Once dirty, parents can just throw them in the washing machine or dishwasher. The book offers a multicultural twist on a classic nursery rhyme. Hickory Dickory Dock follows two mice as they climb Big Ben. The text for the nursery rhyme is printed on the back cover.