Besides Mommy, Daddy, Lucas and food, there are two things that Grace seems to love more than anything else: music and paper. She enjoys hopping into Dad's lap while he's sitting at his office computer and listening to music. She especially likes it when he manipulates her arms wildly, as though she was directing the orchestra or ensemble.
The other great love is paper. Whenever she can get her hands on it, it goes in her mouth.
Here's a short video that proves her love for both (for those who can't hear the music in the background, she "bopping" to Dave Brubeck jazz).