"Arithmetic Brain Puzzles to Develop Thinking Skills: Maze and Trace - Introductory Edition" Masunobu Takahama / Kei Kawashima Price: ¥1100 My child enjoyed solving these puzzles in a fun, game-like way! I purchased this book new from a bookstore. I'm offering it for sale because we didn't have time to use it and missed the opportunity. I believe it's in good condition for use, but please understand that it is a used item stored at home.