The human brain is an incredibly complex organ that can be considered as divided into two hemispheres: the left or logical brain and the right or creative brain. Different responsibilities have been associated with each of these hemispheres.

The left or logical brain is responsible for logical thinking, numbers, calculations, and the identification of black and white colors. It deals with analytical thinking and is used for tasks like reading, writing, and solving math problems.

On the other hand, the right or creative brain is responsible for creativity, imagination, concentration, recall, and photographic memory. This hemisphere is used for tasks like drawing, painting, composing music, and imagining new ideas.

Abacus is an excellent tool that works on the principle of simultaneity, allowing both hemispheres of the brain to work together. Through the use of the abacus, children are encouraged to use both their logical and creative brain hemispheres, helping them to develop a range of cognitive skills.

By using the abacus, children can improve their concentration, memory, and mental calculation abilities. They are also encouraged to use their creativity and imagination to solve problems, leading to a more well-rounded and versatile approach to learning.

Overall, the use of the abacus can help children to engage both hemispheres of their brain, promoting a more holistic approach to learning and enhancing their overall cognitive abilities.