For the giftee on your list who prides him or herself on being the kind of New Yorker who can instantly come up with directions to even the most obscure places (they say things like "City Island? Well, of course you'll need to take the 6 to its terminus before transferring to the BX 29," and always want to tell the story of why Bleecker Street Station only connects with Broadway-Lafayette going downtown), may we suggest this 500-piece puzzle of the MTA subway map? It won't make your friend any less of a know-it-all, but at least it'll keep him or her busy for a while. Plus, it's only $16, which - at the rate things are going - may soon be about the same price as a single Metrocard swipe.
Pick up the MTA Subway Map Puzzle at the Lower East Side Tenement Museum (also online).