Ghostwriter, on PBS
IMDb; Retro Junk; TV Tropes; Wikipedia
Not a great show, but anything that encourages reading probably can't be all bad. And I learned the word "bodega." Anyway, this group of kids were befriended by some weird sort of thing which might be a ghost, who can only communicate by moving letters around to make words... on paper, computer screens, in the air, wherever. And together they solved mysteries. Not much else to say. I was of course too old for the show when it was on, but still it was kinda interesting. Sorta.
A reboot began airing on Apple TV+ in 2019, but I haven't had a chance to see it.