The left brain is mainly logical thinking, and the right brain is spatial imagination. We exercise our right brain with our left hand and our left brain with our right hand. In order to develop the left and right brains at the same time, we can start by exercising the action ability of the left and right hands. You can alternate your left and right hands on weekdays. As long as the left and right hands are equally flexible, we can properly develop the left and right brains, which will play a very important role in the baby's future study and life. At school, there were left-handed people in the class who wrote and played table tennis. We call them left-handed. This kind of students are particularly clever and learn geometry effortlessly. Similarly, he can use his right hand, but he is a bit clumsy compared with his left hand.