We have some thoughts about what desks are good for non-work related fun like jigsaw puzzles and home crafts, but we'd be silly to stop there. There are so many cool accessories that can improve your non-work standing desk experience.
If you're standing at a desk, no matter what you're doing, your time will be greatly improved by a comfort mat to stand on. If you plan on spending time at your desk, and you probably do, you'll be glad you have it.
You might intend to stand up at the desk to paint your wargame figures, make earrings, or play another round of Scrabble, but you might also want to sit down for a spell, too. Consider a chair or two.
You can't be expected to work in the dark, so you shouldn't expect to play in it, either! It's much easier to put together a puzzle or a LEGO set when you can see what you're doing.