Art and Shadowing

Today, for art in "All the Secrets of the World" we discussed shadowing, how a shadow is cast from it's light source. If the light source is above you (think bright, sunny day, at noon) you won't have much of a shadow; when the light source is in front of you, your shadow is behind you; when the light source is behind you, your shadow is in front of you. Here's our photo demonstration:

Here's the light source in front of Thing Two and his shadow
behind him.

Here's the light source behind Thing Two.
Yup, you guessed it, his shadow is in front of him.

Don't recall which photo it was during, but he got a bit confused, because there was enough light coming in that he told me the wrong direction of the shadow. I had to rephrase the question to something like "Which way is your shadow going as a result of the flashlight?" He got it then the correct answer.