We are learning from the birth on how to engage muscles correctly and democratically when moving. A democratic application of a muscle means that a muscle works in harmony with other muscles in a move and according to strength and lever assigned by the evolution. A child is improving quality of control of the muscles by learning how to move. Better knowledge about the motion and gaining the skills can only be the result of learning how to move, and the learning enables a child increasingly better control of the movement potential given to him at birth. However, a child has only limited muscle strength so he does not have other options but to discover and perfect the correct democratic use of his muscles to be able to perform the moves. Better coordination of large number of muscles used in a movement enables better efficiency, which we sense as a pleasant movement (pleasure).
On the contrary, less efficient movement, deriving from poor coordination, is perceived as unpleasant and, if it lasts for a long time, as painful feeling (pain). As seen in observations, a child learning new moves obviously follows a principle: when it is a pleasant motion, he continues exploring and developing in same direction, but when it is unpleasant and painful, he wants to change and end the activity.