Most of the older theories of play did not take into account these three facts, i.e., the identity in original nature of the roots of play and work; the fact that man's original nature fits him for primitive not civilized society; the complexity of the situation--response connection and its necessary variation with minor elements in the external situation and in the individual. Earlier writers, therefore, felt the need of special theories of play. The best known of these theories are, first, the Schiller-Spencer surplus energy theory; second, the Groos preparation for life theory; third, the G. Stanley Hall atavistic theory; fourth, the Appleton biological theory. Each of the theories has some element of truth in it, for play is complex enough to include them all, but each, save perhaps the last, falls short of an adequate explanation.

Two facts growing out of the theory of play accepted by the last few paragraphs need further discussion. First, the order of development in play. The play activities must follow along the line of the developing instincts and capacities. As the nerve tracts governing certain responses become ready to act, these responses become the controlling ones in play. So it is that for a time play is controlled largely by the instinct of manipulation, at another time physical activity combined with competition is most prominent, at another period imagination controls, still later the puzzle-solving tendency comes to the point followed by all the games involving an intellectual factor. This being true, it is not surprising to find certain types of play characterizing certain ages and to find that though the particular games may vary, there is a strong resemblance between plays of children of the same age all over the world. It must not be forgotten, however, that the readiness of nerve tracts to function, and therefore the play responses, depends on other factors as well as maturity. The readiness of other tracts to function; past experience and habits; the stimulus provided by the present situation; absence of competing stimuli; sex, health, fatigue, tradition--all these and many more factors modify the order of development of the play tendencies. Still, having these facts in mind, it is possible to indicate roughly the type of play most prominent at different ages.

Children from four to seven play primarily in terms of sensory responses, imagination, imitation, and curiosity of the cruder sort. Love of rhythm also is strong at this period. From seven to ten individual competition or rivalry becomes very strong and influences physical games, the collecting tendency, and manipulation, all of which tendencies are prominent at this time. Ten to twelve or thirteen is characterized by the "gang" spirit which shows itself in connection with all outdoor games and adventures; memory is a large factor in some of the plays of this period, and independent thinking in connection with situations engendered by manipulation and the gang spirit becomes stronger. At this period the differences between girls and boys become more marked. The girls choose quieter indoor games, chumming becomes prominent, and interest in books, especially of the semi-religious and romantic type, comes to the front. In the early adolescent period the emotional factor is strong and characterizes many of the playful activities; the intellectual element takes precedence over the physical; the group interest widens, although the interest in leadership and independent action still remains strong; teasing and bullying are also present. This summary is by no means complete, but it indicates in a very general way the prominent tendencies at the periods indicated.

The second fact needing further elaboration is that of the complexity of the play activity. Take, for instance, a four-year-old playing with a doll. She fondles, cuddles, trundles it, and takes it to bed with her. It is jumped up and down and dragged about. It is put through many of the experiences that the child is having, especially the unpleasant ones. Its eyes and hair, its arms and legs, are examined. Questions are asked such as, "Where did it come from?" "Who made it?" "Has it a stomach?" "Will it die?" In many instances it is personified. The child is often perfectly content to play with it alone, without the presence of other children. This activity shows the presence of the nursing instinct, the tendency towards manipulation, physical activity, imitation and curiosity of the empirical type. The imagination is active but still undifferentiated from perception. The contentment in playing alone, or with an adult, shows the stage of development of the gregarious instinct. A girl of nine no longer cuddles or handles her doll just for the pleasure she gets out of that, nor is the doll put through such violent physical exercises. The child has passed beyond the aimless manipulation and physical activity that characterized the younger child. Instead she makes things for it, clothes, furniture, or jewelry, still manipulation, and still the nursing instincts, but modified and directed towards more practical ends. Imitation now shows itself in activities that are organized. The child plays Sunday, or calling, or traveling, or market day, in which the doll takes her part in a series of related activities. But in these activities constructive imagination appears as an element. Situations are not absolutely duplicated, occurrences are changed to suit the fancy of the player, as demanded by the dramatic interest. A fairy prince, or a godmother, may be participants, but at this age the constructive imagination is likely to work along more practical lines. Curiosity is also present, but now the questions asked are such as, "What makes her eyes work?" "Why can't she stand up?" or they often pertain to the things that are being made for the doll. They have to do with "How" or "Why" instead of the "What." The doll may still be talked to and even be supposed to talk back, but the child knows it is all play; it is no longer personified as in the earlier period. For the child fully to enjoy her play, she must now have companions of her own age, the older person no longer suffices.

The outdoor games of boys show the same kind of complexity,--for instance, take any of the running games. With little boys they are unorganized manifestations of mere physical activity. The running is more or less at random, arms and vocal organs are used as much as the legs and trunk. Imitation comes in-what one does others are likely to do. The mere "follow" instinct is strong, and they run after each other. The beginnings of the fighting instinct appear in the more or less friendly tussles they have. The stage of the gregarious instinct is shown by the fact that they all play together. Later with boys of nine or ten the play has become a game, with rules governing it. The general physical activity has been replaced by a specialized form. Imitation is less of a factor. The hunting instinct often appears unexpectedly, and in the midst of the play the elements of the chase interfere with the proper conduct of the game. The fighting instinct is strong, and is very easily aroused. The boys now play in gangs or groups, and the tendency towards leadership manifests itself within the group. The intellectual element appears again and again, in planning the game, in judging of the possibility of succeeding at different stages, or in settling disputes that are sure to arise. So it is with all the plays of children: they are complexes of the various tendencies present, and the controlling elements change as the inner development continues.

All activities when indulged in playfully have certain common characteristics. First, the activity is enjoyed for its own sake. The process is satisfying in itself. Results may come naturally, but they are not separated from the process; the reason for the enjoyment is not primarily the result, but rather the whole activity. Second, the activity is indulged in by the player because it satisfies some inner need, and only by indulging in it can the need be satisfied. It uses neurone tracts that were "ready." Growing out of these two major characteristics are several others. The attention is free and immediate; much energy is used with comparatively little fatigue; self-activity and initiative are freely displayed.

At the other extreme of activity is drudgery. Its characteristics are just the opposite of these. First, the activity is engaged in merely for the result--the process counting for nothing and the result being the only thing of value. Second, the process, instead of satisfying some need, is rather felt to be in violation of the nature of the one engaged. It uses neurone tracts that are not "ready" and at the same time prevents the action of tracts that are "ready." It becomes a task. The attention necessarily must be of the forced, derived type, in which fatigue comes quickly as a result of divided attention, results are poor, and there is no chance for initiative.

Between these two extremes lies work. It differs from play in that the results are usually of more value and in that the attention is therefore often of the derived type. It differs from drudgery in that there is not the sharp distinction between the process and the result and in that the attention may often be of the free spontaneous type. It was emphasized at the beginning of this chapter that the boundaries between the three were hazy and ill defined. This is especially true of work; it may be indistinguishable from play as it partakes of its characteristics, or it may swing to the other extreme and be almost drudgery. The difference between the three activities is a subjective matter--a difference largely in mood, in attitude of the person concerned, due to the readiness or unreadiness of the neurone tracts exercised. The same activity may be play for one person, work for another, and drudgery for still another. Further, for the same person the same activity may be play, work, or drudgery, at different times, even within the same day.

Which of the three is the most valuable for educational purposes? Certainly not drudgery. It is deadening, uneducative, undevelopmental. Any phase of education, though it may be a seemingly necessary one, that has the characteristics of drudgery is valueless in itself. As a means to an end it may serve--but with the antagonistic attitude, the annoyance aroused by drudgery, it seems a very questionable means. Education that can obtain the results required by a civilized community and yet use the play spirit is the ideal.

But to have children engaged in play, in the sense of free play, cannot be the only measure. There must be supervision and direction. The spirit that characterizes the activities which are not immediately useful must be incorporated into those that are useful by means of the shifting of association bonds. Nor can all parts of the process seem worth while to the learner. Sometimes the process or parts of it must become a means to an end, for the end is remote. But all this is true to some extent in free play--digging the worms in order to go fishing, finding the scissors and thread in order to make the doll's dress, making arrangements with the other team to play ball, finding the right pieces of wood for the hut, and so on, may not be satisfactory in and of themselves, but may be almost drudgery. They are not drudgery because they become fused in the whole process, they take over and are lost in the joy of the undertaking as a whole; they become a legitimate means to an end, and in so far take over in derived form the interest that is roused by the whole. It is this fusion of work and play that is desirable in education. This is the great lesson of play--it shows the value and encourages the logical combination of the two activities. Children learn to work as they play. They learn the meaning and value of work. Work becomes a means to an end, and that end not something remote and disconnected from the activity itself, but as part and parcel of it. Thus the activity as a whole imbued with the play spirit becomes motivated.