One of the audience picks a card from a deck.
Put the chosen card in a card case with its face down, and strike the case on the table.
In a second, the color of the card’s back and the case changes.
The color of other cards also changes.
One of the audience picks a card from a deck.
Put the chosen card in a card case with its face down, and strike the case on the table.
In a second, the color of the card’s back and the case changes.
The color of other cards also changes.