But the schools which are doing this are few. At best they can hardly touch the tenth part of the boys who are now growing up, while even this tenth is precisely the portion which needs the training least. If the group games are to be made an efficient tool for the physical and moral training of our boys, it will have to be done by the municipalities,--and still more by the parents. Sooner or later, the time must come when an honest and enthusiastic game of ball will be recognized as an important factor, not only in the physical training of every boy, but in his intellectual, moral and even his religious training. In addition, however, to these coöperating group games, the basis of which is, at least in part, the inherent instincts of boyhood, there still remain to be considered certain other gang activities, the instinctive basis of which is much less specific, activities which arise from the general impulse to do something interesting, and to do it in conjunction with one’s fellows. These are gang activities, but only in the sense that the ordinary boy actually does take part in them as a member of the group, and while he might do the same things in solitude, actually seldom does do so. First of these comes swimming. Swimming is perhaps the most popular of all sports during the summer season. The adolescent boy has a craving for the water, and, if not checked, will remain in it for half a day at a time. It is probably, on the whole, the safest way for most boys to get their necessary exercise in very hot weather, while at any time of the year it is, by general consent, the best all-round exercise there is. Moreover, except for the chance of drowning, it is the safest of athletic sports. Neither falls nor sprains nor broken bones nor any of the common accidents of ball field and gymnasium are possible to the swimmer. He cannot so much as strain a muscle against the yielding element. For these reasons and because, of all interesting sports, swimming contributes most to the symmetrical muscular development of growing children, every community ought to provide some sort of convenient swimming place for its boys and girls. If it can manage to give them, in addition, a daily half-hour throughout the year, so much the better. Even an artificial swimming-tank is not especially expensive, when one considers to what large use it may be put. It would certainly be a great improvement if there could be in every public playground a children’s swimming-pool, two or two and one half feet deep, in place of the dirty and useless wading-pool one so often sees.