According to piaget, we begin to make sense of physical reality through exploration during the:

According to Piaget, we begin to make sense of physical reality through exploration during the Sensorimotor stage.

The sensorimotor period alludes to the most early stage which is from birth to 2 years, in Jean Piaget's theory of cognitive development. This stage is portrayed as the time of a child's life when learning happens through a child's sensory and motor interact with the physical surrounding.