Jean Piaget was born in Neuchâtel (Switzerland) in August, 1896. He as the first-born child to Jean Piaget and his wife Rebecca. As a 20th-century scholar Jean Piaget created highly influential theories on the stages of mental development among children, becoming a leading figure in the fields of cognitive theory and developmental psychology. He was a dominant voice in child psychology for a large part of the 20th century. He transformed our ways of thinking about children and their intellectual development. Piaget never held any formal qualifications in psychology and originally specialised in biology-in which he published his first paper (an observation on an albino sparrow) at age 11. This short paper is generally considered as the start