Children are not advised to write before the age of 5. Because, before this, the child's small muscle development is not perfect, and it is still in a growth stage. At this time, blindly letting the child hold the pen will deform his hand. Besides, his bones can't bear it. His hand strength is not enough, so he will hold the pen incorrectly. Once a habit is formed, it is difficult to correct it. When the child 1-3 years old, parents can let the child doodle with oil pastels to strengthen the development of small muscles. At the age of 4, he can use a watercolor pen, and at this time, he must also emphasize holding the pen. Lay a good foundation for writing with a pen at the age of five.