Might Be Obsessive Compulsive

I have started making Henry help me pick up toys at 8pm nightly and then we sit down with a couple books before bed. The last two nights I have noticed a pattern. Henry lines up a sheep, horse, and a lamb along the wall. The kicker to all this is their noses have to be facing the wall and the tractors have to be nearby. If I throw one animal in the toy tote or toy box he goes and finds it for his lineup. He might be a little OCD, or maybe just a very organizational child:)