Piaget's theory is a model of child development and learning. It is based on the idea that the developing child builds cognitive structures - in other words, mental "maps," schemes, or networked concepts for understanding and responding to physical experiences within his or her environment.
Piaget's theory identifies four developmental stages and the processes by which children progress through them. The four stages are:
In other words - children develop cognition at different stages which all have the following characteristics: