Birth & up. Help young children begin to recognize the special people in their lives with this heartwarming book set. Each title introduces children to the idea of family and self in simple, engaging ways. Perfect for building early connections and social-emotional awareness. Gentle text and warm illustrations reflect the loving bonds between children and their families. Rip-proof, chew-proof, and drool-proof, Indestructibles® can completely withstand any kind of interaction with a baby. This durability-combined with the books' non-toxic materials-frees children up to play with the books in any way they see fit.