"Yes," I agreed, "but perhaps the old ones wouldn't see it that way. They might even stop the game. Adults have funny ideas, and there's no use asking for trouble." There was a chorus of assenting thought from the others. All of us had our family troubles. We got to work. Quickly we arranged the interiors of the shelters which we had cleverly built out of materials borrowed from below when the old ones' perceptions were directed elsewhere. The essential structure of the materials had not been changed and could easily be replaced when the time came, but there was no use having to give involved explanations. The old ones never seemed to understand anything. At first we had just built the shelters as play huts, but when the first tourists had misunderstood, we had improved upon the original misconception. Now we had a regular street full of rude dwellings. Lucky for us the old ones never came topside. As the little spaceship landed, Ppon and I and four of the others were ready at its door to form a welcoming committee. The rest dispersed to play villagers. The others took turns alternating the two roles, but I, of course, was always leader. After all, I'd made up the game. Two members of the crew dropped lightly out of the ship and slid a ramp into place. Then the passengers--there was a sizable group this time, I noted with satisfaction--came, followed by Sam, the guide, a grizzled old human. He grinned at us. We were old friends, for he'd been leading these tours for ten of their Earth years. The passengers stopped at the foot of the ramp and Sam ran forward to face them. By now we were used to the appearance of the human beings--small, binocular, with smooth, pasty skins--although they had really frightened us when we first laid eyes on them. * * * * * "Now, you see, folks," Sam bellowed through his megaphone, "the scientists don't know everything. They said life could not exist out here in the Asteroid Belt--and, behold, life! They said these little planets were too small, had too little gravity to hold an atmosphere. But you just breathe in that air, as pure and fresh and clean as the atmosphere of our own Earth! Speaking of gravity, you'll notice that we're walking, not floating. Matter of fact, you'll notice it's even a little hard to walk; you seem a bit heavier than at home. And they said there would be hardly any gravity. No, folks, those scientists know a lot of things, I won't deny that, but they sure don't know everything." "Amazing!" a small, bespectacled male passenger said. "I can hardly believe my own senses!" "Watch out for him," Ppon projected to me. "I think he's a scientist of some kind." "Don't teach your ancestor to levitate," I conceptualized back.