Little Tom came home from school with a new book in his hand. His mother asked him about the book. Tom answered that it was a prise. Mother wondered for what the prize was. The little boy replied that he had got it on the lesson of Zoology. He added that the teacher asked him how many legs an ostrich had had, and Tom answered that it had three legs. When mother nodded that an ostrich had only two legs, little Tom replied that all the pupils had said that it had four legs, so Tom's answer had been the best.