As ideas widen the child's purposes enlarge, and he finds the need for that co-operation which binds human beings together. And so by play enjoyed in common, the feeling of community which is present in the little child is raised to recognition of the rights of others; not only is a sense of justice developed, but also forbearance, consideration and sympathy. "When the room to be filled is extensive, when the realm to be controlled is large, when the whole to be produced is complex, then brotherly union of similar-minded persons is in place." And we are invited to enter an "education room," where boys of seven to ten are using building blocks, sand, sawdust and green moss brought in from the forest. "Each one has finished his work and he examines it and that of others, and in each rises the desire to unite all in one whole," so roads are made from the village of one boy to the castle of another: the boy who has made a cardboard house unites with another who has made miniature ships from nut-shells, the house as a castle crowns the hill, and the ships float in the lake below, while the youngest brings his shepherd and sheep to graze between the mountain and the lake, and all stand and behold with pleasure and satisfaction the result of their hands. The educative value of such play has been brought forward in modern times in _Floor Games_ by Mr. Wells, _Magic Cities_ by Mrs. Nesbit, and notably in Mr. Caldwell Cook's Play City in _The Play Way_. Joining together for a common purpose does not only belong to younger boys. "What busy tumult among those older boys at the brook! They have built canals, sluices, bridges, etc.... at each step one trespasses on the limits of another realm. Each one claims his right as lord and maker, while he recognises the claims of others, and like States, they bind themselves by strict treaties." "Every town should have its own common playground for the boys. Glorious results would come from this for the entire community. For, at this period, games, whenever possible, are in common, and develop the feeling and desire for community, and the laws and requirements of community. The boy tries to see himself in his companions, to weigh and measure himself by them, to know and find himself by their help." "It is the sense of sure and reliable power, the sense of its increase, both as an individual and as a member of the group, that fills the boy with joy during these games.... Justice, self-control, loyalty, impartiality, who could fail to catch their fragrance and that of still more delicate blossoms, forbearance, consideration, sympathy and encouragement for the weaker.... Thus the games educate the boy for life and awaken and cultivate many social and moral virtues."