These four little Frog-Hoppers did not know how lucky they were, and that, you know, happens very often when people have not seen others lonely or unhappy. They supposed that every Frog-Hopper family had two brothers and two sisters living together on a golden-rod stalk. They fed on the juice or sap of the golden-rod, pumping it out of the stalk with their stout little beaks and eating or drinking it. After they had eaten it, they made white foam out of it, and this foam was all around them on the stalk. Any one passing by could tell at once by the foam just where the Frog-Hoppers lived.