I need a (loosely interpreted) science-based treat for this afternoon, mid-city. My initial thoughts were egg creams, phosophates, or boba. The kids would probably prefer the first two. Anyone have a rec for egg creams? Other? Milk does a few things that could be called phosophates but I'd prefer to use it as a backup.
Mr. JudiAU suggested konnyaku which doesn't really work as a "treat"