Thank you for viewing. This is Koguma-kai's cube building blocks. It's a set of 8. I used these for lessons in preparation for elementary school entrance exams. By learning while actually moving them with my hands, I was able to grasp the concepts firmly. Since my child used these for learning, they are somewhat dirty. The box only has the bottom part. I am selling several other items for elementary school entrance exams. If you purchase them together, I will offer a discount. Thank you.