I purchased this for kindergarten and elementary school entrance exams, but I never used it. I opened the box, but it's clean because I haven't used it even once. I hope someone can use it. How about it as a toy? For exam preparation? Or to pass the time while waiting at a restaurant!? ~Regarding Purchase~ Please read my self-introduction for the basics. It was stored at home, so I hope you understand. There are people who, even though it's written, later make claims and demand returns or refunds. Please take responsibility for your purchase. I will not respond to such requests. Type...Building Blocks