SENSATIONS AND RECOGNITION
The young baby manifests a number of sensations early in its career. Hunger and satisfaction as well as comfort and discomfort seem to be recognized by the little fellow. He early learns that the approach of someone when he cries usually means that he is to be taken up, and he usually ceases crying as soon as he is taken up. He early manifests a sense of comfort when he is cuddled; there also is early present a manifestation of the desire to sleep, and the satisfying pleasure of a drink of water.
At the age of three months he has recognized many things such as the light or a bright object. He distinctly recognizes his mother and often smiles at her approach. He recognizes his hands at four months, and now begins to recognize other members of the household aside from his mother. Even as early as one month, he may smile at his mother. At two months of age he will often smile at other members of the family. He laughs out loud or chuckles during the fourth or fifth month. But, on the whole, he must be considered as just a little animal whose greatest needs are to have his appetite and thirst satisfied, his little body clothed, and his little nerves put to rest—to sleep.