(I) Hardly a little boy is to be found who does not collect something; marbles, stamps, coins, cheese labels or birds eggs. (II) He isn't concerned so much with the quality of the things he gathers as with the number. (III) He will proudly tell you he has 876 stamps and go on counting and re-counting them. (IV) By collecting things, man can give free rein to his inherent greed. (V) With his friends, he engages in a primitive kind of bartering and drives hard bargains, such as two match-boxes equal four stamps.