An infant is born. His or her senses of touch, sight, sound, heat, smell and taste meet a new environment. Coordination comes slowly. First, external to the mind is a body. This body is sensitive to indigestion and other discomforts.
Some maintenance is required.
Here both the body and the environment external to it impinge on and react with the mind of the infant child. The boundaries of this body, the skin, especially on the fingers, along with the ears and the eyes provide sensations of the environment beyond the body. During exploration, the child may find that some caution is required, say to avoid repetition of painful experiences due to hot, cold, sharp or hard surfaces. Interaction with the environment brings sensations, sometimes pleasurable and sometimes not. The child learns In moving objects from here to there, in learning to get dressed and to eat, and in learning to talk, the child may come to accept the environment.