Show the loose chromed steel ball and two highly chromed tubes. Place the ball on the tube, clearly showing it's too big to fit thru the tube, but visibly....The ball lowers down the tube and when it comes out, it's permanently attached to the solid, yes solid tube, which can be handed out for inspection. All you do is pretend to put the real ball on top the tube and palm it away. The rest works itself and you're clean.
CONDITION: Like New with leather carry bag (Lacks Instructions)