When the child is a little older his play takes on new forms, for he is now deliberately _making_ things: the chairs become wagons and animals, the corner of the room may be made into a lake, a pencil or a button-hook is quite long enough for a fishing pole, and a handful of beans may be converted into all kinds of merchandise, coins for barter, a flock of birds, or seaside pebbles. That is, as the child's experience broadens, he finds more to imitate, he exercises his imagination more, and combines into more complex plays the materials he finds about him. But all the time the child is _working_, as much so as an artisan at his task; and all the time the child is _learning_, more rapidly probably than if he were at school; and all the time the child is _playing_, that is, enjoying the outlet of his impulses. [Illustration: Work is play.] Play has been called the ideal type of exercise, because it is the kind of exercise that occupies the whole child, his mental as well as his physical side--and later, also, the moral side. In play the exercise is regulated by the interests, so that, while there may be extreme exertion, there is not the same danger of overstrain as is possible with work that he is forced to do. In play the exercise is carried on with freedom of the spirit, so that the flow of blood and the feeling of exhilaration make for health. When children begin to play at work their activities are not entirely imitative, although the kind of work they choose will be determined by the kinds of activities that go on about them. The child has real interests in work; and these should be encouraged and cultivated. The chief interest is, perhaps, the growing sense of mastery over the materials which the child uses. He can make blocks take on any form he pleases; although the first houses he tries to build are apt to be just a random piling of his material, there follows a growing deliberation and planning, so that he comes at last to make what he has _intended_ to make, and not merely produce an accidental result. The earlier plays of the child are not at all in the nature of games; there is not at first the need for a companion. There is no special order in which the various acts of his play have to be carried out. When he plays horse on a stick, or is a parade all by himself, or plays house in the corner, a few simple movements are repeated until the child is tired of them, or until something occurs to shift his interest. Nor is there in these early plays a special point that marks the end of the interest. In games, however, these three factors are always present: it takes two or more to play a game; there is a definite order or succession of events, and there is a definite finish or climax. And as we watch the children at their games we can see their whole mental and moral development unfold before us, for nothing is more characteristic of a child's stage of development than the games in which he is interested.