Show a beautifully decorated mirror in a stand. The mirror is large, 16" x 18." Take the mirror out of the stand and show it all around. Front and back. Nothing to see. Put the mirror back in the stand and the magic begins. A sponge ball held against the mirror "sticks" to the glass. Then, it slowly penetrates right through the solid glass. It looks unbelievable. Hold a silk handkerchief against the mirror. Slowly it begins to penetrate through. Walk away from the mirror. Still, the silk continues to penetrate through. As the silk finishes its penetration, the mirror is once again shown solid. Absolutely unbelievable.