Made of wood and plastic: safe and practical, can be used for a long time, simple and elegant design. Easy to carry: can help people improve their hand-eye-brain coordination. 9 Digit design: improve their calculation ability, brain development, etc. Educational tool: used to practice and learn mathematics, help you remember more. Using an abacus as a math teaching tool can make math practice more effective, is a good way to teach calculation, and makes learning much easier.