Educational picture book series for children, covering geography and social studies. - Title: Why? How? Series - Language: Japanese - Target age: Preschoolers and elementary school students - Theme: Education and learning - Illustrations: Colorful and child-friendly - Series name: Geography, Social Studies, Science - Format: Picture book Thank you for viewing. These are books that children read when they were young. There is some dirt and wear on the covers, but I think they are still perfectly readable.