It is often said, “Dexterity of the hand and mind.” Hand dexterity and mind means that there is a close relationship between human hands and brain. This is because different parts of the human body in the cerebral cortex are occupied by a corresponding motor area, its size is not determined by the size of the body part, but with the fine complexity of the function of the part. For example, although the thumb is small, it occupies almost 10 times more “territory” in the cerebral cortex than the thigh. The more activity of the fingers, the finer the movement, the more it can stimulate cortical excitation, thus making the mind more active. The brain can in turn regulate the dexterity and coordination of the fingers after being stimulated. The two are complemented by each other’s development, thus promoting the development of intelligence. During infancy, hand movements are a part of whole body activity. Infant hand movements appear before language development. Therefore, it is believed that the infant’s hands “speak” before the mouth. The movement of the hand expresses the most subtle changes in the infant’s mind, and it is an important organ for the infant to reach, perceive, and understand the world. Massage the baby’s hands daily, from the fingertips to the wrist, and then gently help each finger for flexion and extension movements, regular exercise can promote brain maturity. Months 3-4 At this time, infants will take anything they catch to their mouths and lick it with their tongues. However, hand and eye movements are not yet coordinated, and although the movements are clumsy, they have begun to develop the ability to perceive objects, which is the simplest cognitive activity for infants. Parents can train their children to take the initiative to touch and touch their little hands with toys to lure them to grasp. You can also hang brightly colored toys 30 to 40 cm high on the child’s chest, so that the child can reach out and touch them, so that he can touch them on his own. The 5th to 6th month At this time, the infant’s hand range of motion and the range of vision are gradually consistent, hand-eye movements are gradually coordinated, and the thumb and other four fingers can be separated when grasping objects. At this time, parents can train their infants to use their hands to grasp hanging toys in addition to lying on their backs, they can also put their infants on their backs and put some toys in front of them for them to get with their hands; or hold their infants in front of the table and let them take the initiative to reach for the toys on the table to practice grasping, shaking and banging. Months 7 to 8 At this time, infants can use their five fingers to manipulate objects and learn the first human manipulative skills. At this time, parents can train infants to clap their hands in welcome, shake hands in greeting, wave goodbye, and reach for hugs. Infants can also be taught to pinch small objects with their fingers. Months 9-10 At this time, the infant’s hands and eyes are able to coordinate joint actions and enjoy repeatedly taking objects in and out with their hands. At this time, parents can teach their children to peel candy paper, hold cookies, manipulate blocks, and open paper packages to retrieve toys to improve their perception of things. Months 11-12 The dexterity of the baby’s fingers increases and the way he or she pinches things develops from a “pincer-type” to a “tweezer-type”. This is the time when parents can train their babies to build blocks, play drums, ring bells, and play with animal toys and motorized toys. In the two years from 1 to 3 years old, children’s finger activities are more frequent and they can learn to throw, hold, grip and pull with the help of toys and utensils, and they can also hold pens to draw pictures, fold paper and play small pianos. In daily life, parents can consciously train their children to drink from a cup with their hands, eat with a spoon, put on and take off shoes, button their clothes, wash their hands and face, etc., so that their children can be skilled in finger movements, and practice makes perfect. As parents do not fear that their children are too young to suffer, and do everything instead, which will inevitably deprive young children of the opportunity to practice their fingers, so that the finger movements are slow to develop, which is not conducive to physical and mental key health. Parents should make good use of various training methods and provide various toys or objects so that children can practice their finger activities at will. This will enhance the function of the fingers and make them more and more dexterous, thus promoting the improvement of intelligence.