After the toddler stage, the next stage of child development is the preschool stage, which begins at 3 years of age and lasts until 5 years of age. During this stage, children continue to develop their physical, cognitive, and social-emotional skills. They learn to follow rules, interact with peers, and become more independent. After the preschool stage comes the school-age stage, which typically lasts from 6 to 12 years old. It is important to note that scholars have different opinions on the exact number of stages of development children go through on their way to becoming adults. However, most sources agree that the stages of child development include the newborn, infant, toddler, preschool, and school-age stages.