This is a math brain training drill for elementary school students from 1st to 6th grade, designed to make learning about 3D shapes fun. - Title: Math Brain Drill: Solid King - Amazing! Nets - Number of pages: 19 pages - ISBN: 978-4-06-300685-5 - Target age: Elementary school grades 1-6 - Publisher: Masanobu Takase & Nozomi Iwai, Hanamaru Learning Society Nets 1-9 have been used. Nets 10-24 are in very good condition. Thank you for looking.