Set of volumes 1 to 10 of the "Sansu Daisuki" series. Learn arithmetic with fun illustrations. - Series Name: Sansu Daisuki - Number of Volumes: 10 - Titles: Volume 1: Which is Bigger? ~ Volume 10: Let's Do Multiplication - ISBN: 978-4-894-20224-4 - Publisher: Nihon Kyobunsha Thank you for viewing. Although my child hasn't used them yet, there are some minor tears from when they were accidentally opened, as well as some scratches and dents from storage. Since there are many volumes, I haven't been able to check them all, but the contents are clean with no writing. They don't appear to have been used at first glance. Some volumes haven't been opened at all. Please understand that this is a used item and that I am a private seller, so there may be oversights. Only those who can accept this should purchase.