Glass cube demonstrates reflection, refraction, and total internal reflection.

A glass cube is set out with an object (pen shown here)behind it and two different colored sheets beneath. Panning around with a camera will demonstrate refraction of the pen, reflection of the opposite color on the side ofthe cube, and the bottom ofthe cube doesn't allow any light to pass from the paper through the eye. Lifting the pen above the cube allows the reflection of the pen to be seen.