Hold one of the translucent solids in the light. You should see a glowing two-dimensional shape that changes as you move the solid around. That's called a "cross-section" of the solid.

Can you find a hexagon cross-section of the cube? Which two of these solids have a square cross-section?

Do you dare to experience the ring of lasers? Slide the cube into the rays of light, and see the shimmering shapes emerge. Can you rotate the cube until you find a hexagon? What surprising shape can you find in the triangular pyramid? Which two solids have elliptical cross sections?