Katsutoshi Kako's Children's Events: Nature and Life. This is a set for the months of September, October, November, December, January, February, and March. The September, October, and March volumes do not have covers. They are basically unused and clean, and there are no major stains as far as a casual inspection can tell. Parents may deepen their understanding by reading these when interacting with children, such as for elementary school entrance exams. This is a bundled sale price, so thank you for your understanding.