Graffiti is children's nature, but children before the age of 4 usually have not entered the stage of creating specific images, so it is best to let them graffiti casually. It is suggested to prepare some commonly used painting materials for children, such as watercolor pens, crayons, finger painting pigments, chalk and even watercolors. Prepare some paper or large white paper and put it in a fixed place at home. You can doodle at any time. Teaching children to draw concrete images at this time not only limits their imagination. It is also easy for children to feel frustrated. The best requirement is that there is no requirement. Encourage him to draw more and freely, and combine painting with language expression. Many children can draw while talking, and some children can only draw but can't say. After the final completion, he will feel relieved and satisfied with the completion.