*: 11 Digits chinese traditional abacus math toy for kids. Small size and 9 colorful beads, design for small child. Good for learning and simple calculation When learning on the abacus, math practice is more effective because you remember more. This makes using an abacus for kids math a great way to teach them how to count and equate and is widely used this way. The abacus is a calculating tool that was used for centuries before the adoption of the written modern numeral system - it is still widely used by merchants, traders and clerks in different parts of the world. Great math educational toy, mental calculation teaching aids Specification: Material: Wooden and ABS Plastic Size Chart: Size: approx. 20.7x8.9x1.5cm/8.15x3.50x0.59inch. Package Includes: 1 Piece Abacus Note: Please allow 1-3cm (0.4-1.18") difference due to manual measurement. Thank you for your understanding.