Its reactions
Its reactions are not coordinated yet, he is not capable to grab a ring intentionally yet, but the movement repeats many days and weeks, in a brain the special operations procedure is gradually built and at last approximately by six months the child already himself, voluntarily, having seen a ring, grabs it.
From this example we see how the nervous system of the baby develops: he by repeated repetitions learns to coordinate the movements of eyes and hands.
More difficult situations also demand equally both repetition, and experience.
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