Lightweight: easy to carry, with box, very convenient for you to take out. Made of plastic material: 1 bead on the top, 4 beads on the bottom, with reset button. Practical tool: Use beads to show numbers concretely and visibly. This is a very useful practical tool in general mathematics. Scope of application: A good tool for early mathematics education, suitable for kindergarten or primary school. 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.