The Sensorimotor Stage
At this stage the infant knows the world through movements and sensations. Children learn about the world through basic actions such as sucking, grasping, looking, and listening.
During this earliest stage of cognitive development, infants and toddlers acquire knowledge through sensory experiences and manipulating objects. A child's entire experience at the earliest period of this stage occurs through basic reflexes, senses, and motor responses.
It is during the sensorimotor stage that children go through a period of dramatic growth and learning. As kids interact with their environment, they are continually making new discoveries about how the world works.
The cognitive development that occurs during this period takes place over a relatively short period of time and involves a great deal of growth. Children not only learn how to perform physical actions such as crawling and walking, they also learn a great deal about language from the people with whom they they interact.