I suppose it's no surprise that "Head, Shoulders, Knees and Toes" is one of Mary's favorite songs, sung in this video by "Music Dog" (creative name, I know). You can check out Mary's skills (albeit, very slow skills) below. In case you're wondering, the thing that she does with her arm is copied from me. I just kind of point toward my knees and toes when we sing this song, rather than bending all the way down to touch them. She picked it up and does the same. Lesson learned: laziness is contagious.