Whenever Claire and I are outside together she notices our shadows-- especially if we are holding hands.
The other night she noticed her shadow on the wall and said in a surprised/worried voice, "Mommy! My statue!"
Me: You mean your shadow?
Claire: Yeah, my shadow. How'd it get in my house?
Me: It followed you :)
For a little while after that she seemed a little afraid of her shadow. I had to show her mine and explain that it was ok to have a shadow in the house.