The instincts of man, though comparatively few and simple, are yet essential to his existence. He has the instinct of hunger and the instinctive recognition of food as food, the instincts to sleep periodically, to rest when tired, and to sport when rested, the instincts of curiosity and imitativeness, and the deferred instincts of sexual and parental love, and perhaps one or two others. All these innate impulses he shares with the lower animals, but those which impel him to store and use his vaster memory are more developed in him than in any other type. Thus the instinct of sport urges him, not only to develop his limbs, but, through experience, to acquire dexterity and much besides. The little girl turns naturally to her doll, which she handles as she will her baby. The play of a boy as naturally involves contests, which foreshadow the grimmer battles of adult life. As he grows older the character of his sport changes. More and more it becomes an appeal to the wits, an appeal to wider experience and a means of adding to it. [Sidenote: A Child’s Play Fits it for the Future] The higher amongst the lower animals also have their sports, which, in every instance, are adapted to fit the members of the species for the future business of life. Compare, for example, the ambush and pounce of the kitten, the ardent chase and overthrow of the puppy, and the climbing proclivities of the kid. As a general rule, in proportion as an animal is capable of becoming intelligent, and as long as it is so capable, it is inclined to sport. A cat loses the desire early in life, a man retains it to the end. A child’s play, therefore, is no indication of mere frivolity. It is the outward and visible sign of an eager and splendidly directed mental activity. Curiosity also prompts the child to store its memory. Imitativeness impels him to acquire those mental traits which enabled his progenitors to survive in their world. Parental love prompts to the care and instruction of offspring. Very illuminating and beautiful is the instinctive delight of some dull and careworn mother in babyish play with her infant, and her joy when it first “takes notice,” and in its earliest beginnings of speech and locomotion. Every animal species is fitted by its structures and their associated faculties to its particular place in Nature. In some cases it holds its own largely through the evolution of some one structure or group of structures. Thus, the bat is especially distinguished by the great development of its fingers and of the web between them, and the elephant by its trunk. The principal distinguishing physical peculiarity of man is the enormous relative size in him of that upper part of the vertebrate brain which is termed the cerebrum, and, we have every reason to believe, constitutes the organ of memory and thought. [Sidenote: Evolution of Man’s Powers]