The Utopians' treatment of valuables makes an analogy to children outgrowing toys, emphasizing their communal lifestyle and disregard for material wealth.
The details about how the Utopians treat valuables develop the central idea by making an analogy between children outgrowing playing with valuables and children outgrowing playing with toys. The passage highlights how the Utopians do not value gold and silver, opting for communal living and viewing material possessions as frivolous irrelevancies.
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