Order Sensitive Period (2 to 4 years old) The child needs an orderly environment to help him recognize things and become familiar with the environment. Once the environment he is familiar with disappears, it can be overwhelming for him. The child’s order sensitivity is often expressed in the requirement for orderliness, habits, and everything. If adults fail to provide an orderly environment, the child “does not have a foundation on which to build awareness of relationships. As the child gradually builds internal order from the environment, intelligence is gradually constructed. Sensitive Period of Interest in Subtle Things (1.5 to 4 years old) Busy adults often overlook the smallest things in their surroundings, but children often catch the mystery. Therefore, if a child is interested in small insects in the dirt or small patterns on clothes, it is a good time to develop a child’s habit of understanding the smallest details and the smallest details. Social norm sensitive period (2.5-6 years old) At the age of two and a half, children are gradually moving away from self-centeredness and are interested in making friends and group activities. At this time, parents should establish clear norms of life and daily etiquette with their children so that they can later follow social norms and have a self-disciplined life. Writing Sensitive Period (3.5 to 4.5 years old), Reading Sensitive Period (4.5 to 5.5 years old) Although the child’s writing and reading abilities are late, if the child gets sufficient learning during the sensitive period of language, senses, and body movements, his or her writing and reading abilities will arise naturally. At this time, parents can choose more reading materials, set up a home environment full of books, that can make the child develop a love of reading good habits.