Music to my ears

Chase was coughing his little head off tonight, so I went in to check on him and take him some water. I snuggled up next to him and he mumbled something I couldn't quite understand. I asked him to repeat it. He grinned a sheepish grin and said, "No." I asked, "Were you just talking in your sleep?" He again said, "No." And then, "I was gonna do an Angry Bird song." Let's go ahead and call that talking (almost singing) in his sleep. Do Angry Birds even have songs?!