Though as far as "best," it's pretty hard to argue against the ruby slippers.
We're getting a bit loose with our definition of "prop" here. According to Wiki:Another prop I forgot that I really liked: The LIGHT CYCLES from Tron!
Those famous ruby slippers are wardrobe items, not props. And the Light Cycles from Tron were computer-animated; they never existed in physical form.In practical terms, a prop is considered to be anything movable or portable on a stage or a set, distinct from the actors, scenery, costumes, and electrical equipment.