Instruct: Classify the given Amazon review as either positive or negative.
Query: Buy this Book

Every parent ought buy this book for their 7-12 year old child. It is a very, very good introduction to more elementary mathematics. I still have mine from childhood and use parts of it in my Philosophy Courses (at a rather selective university) to help explain what my above-average college students never understood--were never taught/never asked TO THINK about--in grammar school or high school. Of course, would there were similar (but deeper) books for the teen-aged set.