What do you notice? Does the image remind you of something?
How does the image change when you, the object, or the light source moves?
Why did the shadow, color, or image change?
What happens with different light sources?
Change the color of the background and observe what happens.
If you use two different light sources at the same time, how did the image or color change?
Wonder about what will happen before you make a change. Did what you thought would happen occur?