Periods of Development
Prenatal Period is the time from conception to birth, roughly a nine-month period.
Infancy is the development period that extends from birth to 18 to 24 months. They are extremely dependent on adults. They start to learn the language, social learning, and symbolic thought. They explore sensorimotor coordination like sense of touch, sense of taste, sense of sound, sense of smell and sense of sight.
Early childhood is the development period that extends from the end of infancy to about 5 to 6 years of age. This period is called the preschool years. During this time, young children learn to become more self- sufficient. Their language expands; they develop school readiness skills like identifying letters and to follow instructions. They spend many hours in play and with peers.