This was very interesting and made the little sister forget to pout and the little brother come out of his foam-corner. He even looked as though he might ask a few questions, so the big brother added, "Now don't talk to me, for I must think about something." It was not long after this that the young Frog-Hoppers changed their skins for the last time. The outside part of the foam hardened and made a little roof over them while they did this. Then they were ready to go out into the meadow. The big brother felt rather uncomfortable, and it was not his new skin which made him so. It was remembering what he had said about the world outside. When they had left their foam and their golden-rod, they had much to see and ask about. Every little while one of the smaller Frog-Hoppers would exclaim, "Why, you never told us about this!" or, "Why didn't you tell us about that?" Then the big brother would answer: "Yes, I did. That is one of the things which I said were not like either golden-rod or foam." For a while they met only Crickets, Ants, Grasshoppers, and other six-legged people, and although they looked at each other they did not have much to say. At last they hopped near to the Tree Frog, who was sitting by the mossy trunk of a beech tree and looked so much like the bark that they did not notice him at first. The big brother was very near the Tree Frog's head. "Oh, see!" cried the others. "There is somebody with only four legs, and he doesn't look as though he ever had any more. Why, Brother, what does this mean? You said everybody had six." At this moment the Tree Frog opened his eyes a little and his mouth a great deal, and shot out his quick tongue. When he shut his mouth again, the big brother of the Frog-Hoppers was nowhere to be seen. They never had a chance to ask him that question again. If they had but known it, the Tree Frog at that minute had ten legs, for six and four are ten. But then, they couldn't know it, for six were on the inside. [Illustration] THE MOSQUITO TRIES TO TEACH HIS NEIGHBORS In this meadow, as in every other meadow since the world began, there were some people who were always tired of the way things were, and thought that, if the world were only different, they would be perfectly happy. One of these discontented ones was a certain Mosquito, a fellow with a whining voice and disagreeable manners. He had very little patience with people who were not like him, and thought that the world would be a much pleasanter place if all the insects had been made Mosquitoes. "What is the use of Spiders, and Dragon-flies, and Beetles, and Butterflies?" he would say, fretfully; "a Mosquito is worth more than any of them."