What does his family use to try to distract Vardaman from his mother's death?

"Dewey Dell tells him of the train set "behind the glass, red on the track" in the Jefferson shop window (66).  Concerns about the train permeate Vardaman's thoughts throughout his journey.  He frequently thinks of the train, "shining with waiting," and pesters Dewey Dell with his worry that one of the town boys has bought it (100; 102).  His desire for it makes his "heart hurt" (216).  Once in Jefferson, however, he readily yields to Dewey Dell's compensatory suggestion that he'd "rather have bananas" (252)."