Mr. Wizard's World

Paper Movie Machines, Dolphin Language, Heat Expansion, Petrified Forest, Mobile Challenge and more (3x10)

Air date: Jul 21, 1986

Paper Movie Machines, Dolphin Language, Heat Expansion, Rope on Wrist, Petrified Forest, Paper Tear, Killdeer Act, Mobile Challenge. Bibi watches Mr. Wizard swing a light in a circle to produce a streak of light. He explains that the so-called persistence of vision is the reason motion pictures create the illusion of movement.