Trace the shadow of your sculpture - foil figure or another object with a clearly identifiable shape. Ask, "If I hold the light here, will the shadow move?" Explore how the shadow elongates and shortens as the light is moved.
Make a Stick Person! Heck, make a Stick Community! Fun, open-ended craft that preschoolers (and toddlers) can do all by themselves, and work on their fine-motor skills at the same time. Plus you get some free DIY dolls to roleplay with at the end!