In an interesting paper Dr. Gulick[5] divides play into three childish periods, separated by the ages three and seven, and attempts to characterize the plays of early adolescence from twelve to seventeen and of later adolescence from seventeen to twenty-three. Of the first two periods he says, children before seven rarely play games spontaneously, but often do so under the stimulus of older persons. From seven to twelve, games are almost exclusively individualistic and competitive, but in early adolescence "two elements predominate--first, the plays are predominantly team games, in which the individual is more or less sacrificed for the whole, in which there is obedience to a captain, in which there is coöperation among a number for a given end, in which play has a program and an end. The second characteristic of the period is with reference to its plays, and there seems to be all of savage out-of-door life--hunting, fishing, stealing, swimming, rowing, sailing, fighting, hero-worship, adventure, love of animals, etc. This characteristic obtains more with boys than with girls." "The plays of adolescence are socialistic, demanding the heathen virtues of courage, endurance, self-control, bravery, loyalty, enthusiasm." Croswell[6] found that among 2,000 children familiar with 700 kinds of amusements, those involving physical exercises predominated over all others, and that "at every age after the eighth year they were represented as almost two to one and in the sixteenth year rose among boys as four to one." The age of the greatest number of different amusements is from ten to eleven, nearly fifteen being mentioned, but for the next eight or nine years there is a steady decline of number, and progressive specialisation occurs. The games of chase, which are suggestive on the recapitulation theory, rise from eleven per cent in boys of six to nineteen per cent at nine, but soon after decline, and at sixteen have fallen to less than four per cent. Toys and original make-believe games decline still earlier, while ball rises steadily and rapidly to eighteen, and card and table games rise very steadily from ten to fifteen in girls, but the increment is much less in boys. "A third or more of all the amusements of boys just entering their teens are games of contest--games in which the end is in one way or another to gain an advantage one's fellows, in which the interest is n the struggle between peers." "As children approach the teens, a tendency arises that is well expressed by one of the girls who no longer makes playthings but things that are useful." Parents and society must, therefore, provide the most favorable conditions for the kind of amusement fitting at each age. As the child grows older, society plays a larger rôle in all the child's amusements, and from the thirteenth year "amusements take on a decidedly coöperative and competitive character, and efforts are ore and more confined to the accomplishments of some definite aim.