A philosopher once said, "The hand is the external brain of man." "Training a child's hands can promote their intellectual development. Under the cerebral cortex, there is a large area dedicated to the management of the movement of the hands.

In two-handed movements, the gripping action is of particular importance. The grasping movement can form a visual and motor coordination, which is the starting point of various complex activities, so training children's fingers can promote the development of their cerebral cortex.
So, how do you train your child's fingers? Parents should massage their child's hand every day, gently massage from fingertip to wrist, help the child stretch and flex his fingers, and provide the child with toys to induce them to touch, grasp and pull with their hands.
For babies 7 to 8 months old, they can be trained in reaching out, waving, clapping, and handing objects from one hand to the other. In 9 to 10 months, children can be trained to extend their index fingers to poke, pluck, pry, stroke and other actions, and train them to catch things and then release their fingers and let go of things. Children will be very keen to pick up something, drop it, and pick it up again, which is the causal relationship between them repeating the practice and exploring the action.
0 to 2 years old is the child's sensory action period, the child uses the sensory action to understand the external world, but also the best period for the development of children's ability. 3 years old is the peak of children's early motor development, during training, parents can provide children with suitable toys, such as blocks, crayons, balls, etc.
The child's motor development, including the development of two-handed movements, has diagnostic significance in medicine, so if parents find that their children's movements are abnormal, they should find a doctor for examination and treatment as soon as possible, and do not take it lightly.