When a child is born, he or she is neurologically, motorically, sensorially and cognitively immature. As they grow up, they gain in competence and mature neurologically. To gain competence, children need to experiment and discover their environment, mainly through play.
All of baby's explorations will have an impact on his perceptive and sensory memory, leading him to enrich his stock of sensory information, which he will memorize and be able to reuse later.