Educational toy that allows you to learn arithmetic and number concepts by "seeing" and "touching." Features: * ABS resin case. * A divider in the center allows for an intuitive understanding of number groupings and the composition of 10. * The golden ratio is engraved on the back of the box, and the size of the box itself is also in the golden ratio. You can intuitively and intimately feel the mathematical beauty. * There are indentations in the positions of the beads, allowing them to fit perfectly. * It comes with a sliding lid to prevent the loss of beads. The specifications have been changed so that you can roll the beads with the lid closed. Contents: * Nummer Kasten main unit * 10 white marbles * Add 10 more marbles for an additional 200 yen. Condition: * Unused * The surface is matte and smooth to the touch. Recommended for learning and as interior decor. Size (approximate): Width: approx. 15cm, Length: approx. 10cm, Height: approx. 3cm Recommended points: * Popular as Montessori education and STEAM materials. * "Number art" experience that both children and adults can enjoy. * Simple and golden ratio design, good for display. Type...Numbers Popular keywords...Montessori Nummer Kasten Numakas Educational toys Type...Nature/Science Popular keywords...Shichida method Please refrain from purchasing if you are concerned about minor details, as this is a private sale.