KUMON Kumon Arithmetic materials, 5A1-90, perfect for learning numbers. My 3-year-old son was using these. They are relatively clean. Please understand that these are used items. I am also selling Japanese language and Zun Zun materials. - Material Name: Arithmetic 5A1-90 - Publisher: KUMON - Number of Pages: 30 pages - Contents: Learning Numbers - Condition: Good Thank you for looking.