Description 1. Children's abacus brown bead Black Dingshen ink bead mental arithmetic can help children improve their arithmetic calculation ability through practical operation, so that they can learn and progress in the game. 2. By manipulating brown and black beads to perform calculations, children's attention and concentration can be effectively cultivated. 3. Using this abacus for complex calculations can exercise children's acuity of thinking and logical reasoning ability. 4. The design of this children's abacus is very exquisite. The collocation of brown and black beads makes this calculator more noble and classical. 5. Both adults and children can easily calculate by moving the beads, truly learning and entertainment. Specifications: Material: ABS Plastic Size: Reference image Color: As shown in the figure Package: 1Pcs Abacus