Each book has a different theme and gimmick, stimulating children's curiosity. Top left panda picture book: The title is "Whose Eyes Are These? Zoo" and it's a peek-a-boo book where you can see parts of animal faces through holes. Some have moving eyes. Bottom Cinnamoroll picture book: The title is "Cinnamoroll's Picture Book: What Do You Like?" It introduces what Cinnamoroll likes, and has a "secret memo" that reveals how to spend happy days. Top right red picture book: The title is "012 Year Old Animal Word Book 500." You can learn the names of things around you, such as food, vehicles, and animals, which helps deepen communication between parents and children.