Haha, cute. Looks like he's sucking his thumb! Like he was going to go fetal, but he fell asleep before he could tuck his feet in all the way. Such a cherubic expression!
I really enjoyed all 5 shots. Thought it was a really strong series. Like the way you captured a sense of isolation in each shot. You've also managed to capture a feeling of 'neither here nor there'...of waiting and expectancy. Cool...