Early childhood is a stage in human development following infancy and preceding middle childhood. It generally includes toddlerhood and some time afterward. Play age is an unspecific designation approximately within the scope of early childhood. Development of self-regulation across early childhood Development during early childhood is an important topic, specifically self-regulation during this stage of development. This study took place in 4 different areas, which included Michigan State University, Oregon State University, University of Michigan and the Texas Health Science Center at Houston. Within this study, a sample of 1,386 children between the ages of 3 and 7 years old were studied. Self-regulation is known as an individual functioning that leads to future life successes or goals. Areas that played a role in these children’s trajectories were their gender, the language they spoke, and even their mother’s education. The main limitation of this study was that the researchers were not able to gain the full view of self-regulation due to the fact children tend to develop rapidly between the ages of 3 and 7. This made it more difficult to assess their progress and when it occurred. Psychology In psychology, the term early childhood is usually defined as the time period from birth until the age of five or six years, therefore covering infancy, Pre-K, kindergarten and first grade. There are three simultaneous development stages: It is distinct from early childhood education, and does not necessarily refer to the same developmental stage of early childhood. It is an educational category designed to support children from nursery schools, all the way until the equivalent of third grade. Piaget's Theory of Development Stages 1.Sensorimotor, ages birth to 2 years old. - During this stage, children gain an idea of the world using skills such as hearing, seeing, touching, and reaching. This allows them to gain the understanding that things exist and assists in rapid development. 2.Preoperational, ages 2 to 7 years old. - Children are able to form thoughts without logic, but helps give them a better understanding of the world around them. 3.Concrete Operational, ages 7 to 11. - Includes developed as well as rational thoughts. This stage also allows children to gain thoughts such as organization and purpose of situations. 4.Formal Operational, ages 11 and up. - During this stage, individuals are able to create thoughts of their own, rationalize, create ideas in situations, and overall have opinions that are