The answer to the riddle was Uhura. And a gift was left in her care, just like one had been left for McCoy, and before him Spock. Again, there is a note with the gift.

Always look at all the angles. You will be surprised what you can discover

Inside the gift are Hebrew Boggle cubes. The cubes are hand-crafted. They come with a Boggle board, with instruction on how to play, and they also come with a Scrabble board, with instructions on how to use the cubes to play a multi-dimensional game.