Now that you mention it, I distinctly remember that I loved to hear myself count in my head and I did it as often as I could like when I was just sitting in the back of my parents' car while we were driving somewhere. I never shared that with anyone until right now, so, I think the fact that you already know that about your child is great and helpful to your family. I am not sure at all, but sometimes when I see Brick, the youngest brother character on the television show The Middle, I am curious about how he repeats words out loud in a low whisper - that seems almost like a type of narration to me, but I am not an expert on that point.