"Kirameki Sansu Nou: Nyugaku Junbi ~ Shogaku 1-nensei Kazu Ryou" (Sparkling Arithmetic Brain: Preparation for Enrollment ~ Elementary 1st Grade Numbers and Quantity) SapiX Elementary School Price: ¥1900 (excluding tax) Brand new, unused, no creases. All stickers are included. This is a collection of excellent problems, often featured in magazines. I think this is a fun drill for children to learn before entering elementary school.