Now babies can learn all about the things that go in a book that's indestructible. With call-out identifications on each spread, Things That Go! is a vibrant introduction to those irresistible vehicles that fly, drive, sail, dig, lift, dump, and more. With almost two million copies in print, Indestructibles are the books built for the way babies read. They are 100 percent baby-proof, chew-proof, rip-proof, and drool-proof. Printed on a unique nontoxic, paperlike material that holds up to anything babies can throw at it - gumming, spilling, dragging across the floor - Indestructibles are the little books that could. They're indestructible. And if they get dirty, just throw them in the wash.