It was a source of much frustration that he couldn't easily carry both balls for any length of time.
As I rocked him before his nap, he had just one word for me, "Ball?"
Me: "You can't take the ball to bed, but you may have it as soon as you get up."
Little Man: (Looking more than a little disappointed) "Oh."
I have no doubt that as soon as I enter his room, he'll be asking for his ball. Perhaps obsessed is a bit of an understatement.