Piaget died in Geneva on September 16, 1980, after he contributed to leaving the set of books, and articles about the cognitive development of the child in his studies.
Confirms Piaget's theory on the cognitive development of the person gets through the interaction between him and the environment. Also, change the point of view of the individual according to the environment in which they live. This development pass on four stages:-
Sensorimotor :-
The first phase, which noted begins from birth to two years old, and it is the sensorimotor stage. At this stage, the child communicates with others through sounds and simple words. Also, they imitation of what they see and what they hear.
Periods of sensorimotor stage