question:  Why does Donald's wife think it is funny that Donald might lead the junior achievement group?
context: Fallout is, of course, always disastrous— one way or another JUNIOR ACHIEVEMENT BY WILLIAM LEE ILLUSTRATED BY SCHOENHERR "What would you think," I asked Marjorie over supper, "if I should undertake to lead a junior achievement group this summer?" "Why, Donald," she said, "it could be quite interesting, if I understand what a junior achievement group is. "Mr. McCormack called me to the office today, and told me that some of the children in the lower grades wanted to start one. It is an uneasy privilege then, at least sometimes, to teach my old-fashioned brand of science to these children of a new age. "That's very nice," said Marjorie. "It has the purpose," I told her, "of teaching the members something about commerce and industry. 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. Mr. McCormack is going to put up fifty dollars to buy any raw materials wanted 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. The three who were sitting to my left were the ones who had proposed the group in the first place. Peter Cope, Jr. and Hilary Matlack were skinny kids, too. 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 junior achievement idea has sparked their imaginations. You're Dr. Matlack's son, aren't you? Healthy mice of the right strain," I explained to Tommy, "might be sold to laboratories.
output:  Donald has no desire or innate talent to participate in sales- or marketing-related schemes
options:  Donald is prone to get carried away with 'side projects,' which his wife finds amusing  Donald's students know more than he does about science and industry  Donald has no desire or innate talent to participate in sales- or marketing-related schemes  Donald comes home each day and complains about his students, yet he is volunteering to spend more time with them