 What is the central irony at the end of the story? He ends up becoming an employee of children
It is an uneasy privilege then, at least sometimes, to teach my old-fashioned brand of science to these children of a new age. "It has the purpose," I told her, "of teaching the members something about commerce and industry. They manufacture simple compositions like polishing waxes and sell them from door-to-door. Some groups have built up tidy little bank accounts which are available for later educational expenses." Marjorie put back her head and laughed, and I was forced to join her, for we both recognize that my understanding and "feel" for commercial matters—if I may use that expression—is almost nonexistent. This was to be our headquarters and factory for the summer—a roomy unused barn belonging to the parents of one of the group members, Tommy Miller. Mary McCready was a big husky redhead of twelve, with a face full of freckles and an infectious laugh, and Tommy Miller, a few months younger, was just an average, extroverted, well adjusted youngster, noisy and restless, tee-shirted and butch-barbered. The parents had agreed to underwrite lunches at the barn and Betty Miller philosophically assumed the role of commissary officer. I'd forgotten all about organization, and that, according to all the articles I had perused, is most important to such groups. It's standard practice for every member of the group to be a company officer. Of course a young boy who doesn't know any better, may wind up a sales manager. Peter Cope waved it off by remarking that they'd each do what came naturally. On the other hand, they pondered at some length about a name for the organization, without reaching any conclusions, so we returned to the problem of what to make. It was Mary, finally, who advanced the thought of kites. Tommy, for example, wanted to put tooth powder into tablets that one would chew before brushing the teeth. He thought there should be two colors in the same bottle—orange for morning and blue for night, the blue ones designed to leave the mouth alkaline at bed time. These latter ideas had made unknowing use of some basic physics, and I'm afraid I relapsed for a few minutes into the role of teacher and told them a little bit about the laws of radiation and absorption of heat.
 While Donald is excited about the opportunity to impart his knowledge, he becomes the employee of students who have more qualifications than he does
 While Donald feels insecure regarding his science background, he becomes more confident due to his experience innovating with the children  While Donald initially expresses concern about selling items door-to-door, all the customers end up coming to him and the group members  While Donald is excited about the opportunity to impart his knowledge, he becomes the employee of students who have more qualifications than he does  While Donald despises teaching, he ends up committing to more teaching-related responsibilities over the course of a school year