Effective educational tools. When studying on an abacus, math exercises are more effective because you remember more. This makes using the abacus for children a good way to teach them how to calculate and equate, and it is widely used. The abacus is a calculation tool that has been used for centuries before adopting the modern written number system-it is still widely used by merchants, merchants and clerks in different parts of the world. Abacus is widely used to teach children counting and mathematics-people who are proficient in abacus will almost automatically become good at mental arithmetic. This abacus has a sturdy plastic frame-its classic design makes it easy to use as a professional and educational tool. Suitable for children above the second grade. Size: 103*22*253mm Quantity:1pc Note: Manual measurement, there may be 1-2cm/1-3g error, which is not a quality problem. Due to different screen displays, there may be a color difference between the real object and the picture, and the main picture shall prevail.