The New York Public Library has a great exhibit dedicated to Federico Garcia Lorca. The big surprise for me was that Lorca's very own guitar was in one of the display cases. Photography was not permitted, and there are no photos of the instrument to be found on line (shame on me for not writing down the name of the maker).
There is, however, a terrific film about Lorca uploaded to YouTube by Gottfried Geist. A little after the 3-minute mark of this segment, there's a recording of Lorca playing the piano.
In another segment (I believe it's the second segment), Lorca's brother talks about Federico having such bad penmanship as a child that he had to take the class multiple times.
Here's a link to all the segments of the film.