Magicians have three equal lengths of rope tied in circles. With a magic pass, they will link and unlink and penetrate each other without untying the knots! A great visual effect. Resets immediately. Easy to do.
The Magician displays three different lengths of rope--long, short and medium. PRESTO: They all become the same length! With a wave of the hand suddenly they are back to long, short and medium. Everything can be examined. Easy to do.
A card has one spot on its face and four spots on the back. Turn it over and three spots appear on the front. Repeat and six spots are revealed. What’s next? More spots in front of your eyes until the entire card is filled. Will last forever, self-contained.