This reminds me of one of those "my mood today is..." magnetic collages where you can move a frame over the appropriate image (except of course, Grady doesn't look angry or sad in any of the photos). I wonder if babies are actually going through all the emotions their facial expression suggest, or if they are just using their muscles randomly.
Ha! There are more than enough examples of sad/angry, but for some reason Jasper purged them from the record. And I know really early on, it's pretty much random. Some of Grady's are meaningful now, but certainly not all.