Abacus, Bead Arithmetic Counting Abacus with Reset Button 13 Column Chinese Calculator Math Counting Tool for Students Kid Calculator Counting Tool for Kid Educational Brain Teaser Toys Gift

OverviewMaterial:
ABS material/ABS frame/Wooden pole. Non-toxic. Strong and durable.
Beads:
5 beads and 13 digit. Smooth beads, will not scratch your fingers.
Simple operation: 
Reset button, easy to operate. Make children learn simple number operations. It is a good companion for children to learn.

Evolution Chinese Abacus, Suanpan
The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hindu–Arabic numeral system.The exact origin of the abacus is still unknown. Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal.

Application
Although today many use calculators and computers instead of abaci to calculate, abaci still remain in common use in some countries. Merchants, traders and clerks in some parts of Eastern Europe, Russia, China and Africa use abaci, and they are still used to teach arithmetic to children. Some people who are unable to use a calculator because of visual impairment may use an abacus.