You place a coin on a black mat and stack the two rings around the coin and cover all with a "?" disk, making a "Haunted House"! You ask the ghost in the 'house' to take the coin away! You lift the "roof" off of the rings and the coin has completely VANISHED!
You place the disk back on the rings and invite the ghost to return the coin. You lift the rings and the disk and the coin has magically RETURNED!