For 0 and 1 year olds Building a foundation for learning through verbal interaction Interactive Picture Books, Set of 2 These books contain children's picture books, games, and parenting advice for parents. I received these as a gift, but only flipped through them and didn't use them. There are no folds inside, and the supplements are unused. There is a slight fold in the obi (paper band) that seems to have occurred during storage. - Title: Kumon's Interactive Picture Book 0-year-old - Title: Kumon's Interactive Picture Book 1-year-old - Spine Color: Yellow - Spine Color: Blue - Publisher: Kumon Thank you for looking.