8 Cards are shown.
4 red. 4 black.
They are separated to construct a catapult.
One red card is used as the pult and the other red cards form the spring.
The black cards form the trigger to…..PoP!
The red cards visual transform to black ones in mid air.
After the cards settle and the realization of that visual change sets in, the black cards that were set aside are now the red ones.
An instant visual transformation!