If children are to attend kindergarten, they need to meet the three-week mark. If a child is under three years old, he or she often cannot defecate or express his or her needs on his or her own, thus affecting the child’s learning and life in kindergarten. If a child is to attend preschool, it is recommended that this be done after reaching the age of three weeks. If the time to go to elementary school, to meet the six weeks of age, because the six-week-old child growth and development is relatively mature, brain and nervous system development is more perfect, able to accept the needs of good learning cultural knowledge, this situation children can carry out school. Because this age, both physically and psychologically, can meet the needs of elementary school, this situation can be normal school, too early or too late is not good.