Please be sure to read the self-introduction. ※ Please refrain from price negotiations for this product. This is a calculation game where you use the four arithmetic operations (addition, subtraction, multiplication, and division) on the numbers of five white dice to create the sum of the numbers on the black dice. For details, please see the Masudaya website. There is a feeling of use, so please purchase only if you are okay with that. There is no box, only the main unit is for sale. Thank you for viewing.