The guy got a book from his school library that he was really excited about, then came home and made the train from it the best he could with the Lego pieces he had. Surprised that 1) he is now OK with his model ending up looking very different from the inspiration because of the lack of custom parts and 2) he is back to feeling confident about his own Lego designs. These are both important aspects of being able to make the things you want in a healthy way!