@pts I apparently missed your Ask, but FWIW I think Diego would be pretty into that, particularly if you picked out a book for him to read / correspond about.
@pts We've been reading some Terry Pratchett and Louis Sachar together. On his own, he's been enjoying the Mouse and the Motorcycle, the Diary of a Wimpy Kid and the Origami Yoda series. He also has been reading a lot of science nonfiction and has been drafting an outline of an extremely complicated time travel murder mystery he wants to write this summer.
@signalnine Hey! That would actually be very cool. What's he interested in, these days?