Piaget's Developmental Stages

According to a psychologist "Jean Piaget", children go through different stages. There are four critical stages of child development. The stages are marked by shifts in how children understand their world. "Piaget stated in https://www.verywell.com/piagets-stages-of-cognitive-development-2795457 that he beleives that the children are called "little scientists" where they are actively trying to explore and make sense of their world that is around them. While "Jean Piaget" did some observation of children he had developed the stages that include the following four distinct stages. The first stage which is when the baby was born and goes to age 2 and that stage is called the sensorimotor stage, from the age of 2 to the age of 7 the stage is called