Concept of abacus

The human brain is divided in to two parts: Left Brain & Right. When we use our right hand, our left brain works and when we use our left hand, our right brain works. But generally, children only use their one hand while writing, etc. so their only one brain works, But in Abacus we make them use their both the hands simultaneously, so their both the brains (i.e. left & the right one) work together resulting in better accuracy, visualization & accuracy.