Sympathetic Diamond

Effect: A large Ace of Diamonds changes colour when coloured handkerchiefs are passed over it.

Secret: The principal diamond on the card is actually cut out. It gets its colour from a piece of card held behind the Ace. Each time you want the colour of the diamond to change the secret card is moved to a new position. To get a multi-coloured diamond, position the card centrally so all four corners on the card are visible through the diamond-shaped hole. The handkerchiefs hide the movement of the secret card, look colourful and provide a reason for the colour changes.