Worby's Store is a location in Grouchytown, the hometown of Oscar the Grouch, which is the opposite of Hooper's Store back on Sesame Street. The owner, of course, is a Grouch from Grouchytown named Worby, who is a friend of Oscar the Grouch.
During their Grouchytown tour, Oscar takes Bob to Worby's Store, which is the opposite of Hooper's Store back home. Oscar calls Worby out, & he agrees to give them some food if they get lost. The specials for that day were a sardine-blueberry sandwich, a pepper-marshmallow steak, & a tomato surprise (which they're out of). Bob doesn't want to eat anything at 1st, but Oscar reminds him that trying new foods is a part of the traveling experience. To everyone's surprise, Bob likes the sardine-blueberry sandwich when he tries it! Oscar reassures a distraught Worby, "He's only a tourist here; he doesn't know any better."