Birth & up. Soft and durable, Indestructibles are chew-proof, rip-proof, nontoxic and 100% washable. Give babies books that they can handle-and that can handle them! Chew-proof, rip-proof, and drool-proof, Indestructibles can withstand any and all forms of infant behavior. They are also non-toxic and washable, which means that infants can explore to their heart's content. The captivating illustrations and soft, inviting textures in these books will provoke significant sensory development. This set includes basic concepts like opposites, colors, shapes, numbers, outdoors, seasons and kindness. Each has bright illustrations that capture the attention of infants and toddlers.