Not much progress today.
I’ve been trying to pick small areas as starting points, to avoid dealing with 2000 pieces of the same color. The problem is that similar pieces were often sorted into different piles, due to a combination of the limited space we had initially available and the sheer number of pieces (I swear the elephants are life-sized). Thus a good portion of today was spent re-sorting. And that was just the blues and part of the yellows, so there is more sorting in the future.