A strong sense of proprietorship in personal possessions is now manifest, and is closely allied to the acquisitive faculty. About the ninth year he begins to make collections of various sorts of junk. This is the beginning of the collection craze which lasts throughout the individualistic period. Its initial manifestation is usually the collection of foreign and domestic postage stamps, which lasts from three to five years and furnishes one of the best methods for elementary scientific training. The term science implies knowledge systematized and reduced to an orderly and logical arrangement, with classification as its basis. Such collections teach him to group and classify their component parts according to some definite plan. The intellectual training afforded by the grouping and classifying necessary to preserve his collection possesses educational value of the highest quality. Geography now has a new and personal meaning as “the places where his stamps came from.” Other phases of this tendency may be seen in collections of marbles, agates, tops, buttons, bird eggs, leaves, minerals, monograms, crest impressions, cigarette pictures, and cigar bands. One boy proved his industry and trend toward personal acquisition by collecting and classifying several hundred tin cans which were formerly receptacles for fruit, beans, and meats, and the odors emanating from the mass in no wise diminished his pride in the collection, which he regarded in the same light as the connoisseur views his art treasures.