Color Changing Ball to Jumbo Square by Goshman

The magician displays a red ball and places it into his left hand. Suddenly, the ball disappears and is found to have jumped into the performer's pocket!

He places the colored ball on top of his left closed fist and pushes down inside his hand with his index finger. He asks the participant which hand contains the red ball and no matter what they answer, the participant will be in for a surprise...in the magician's left hand is a large (2.5 inch) red square and in his right hand is a black ball! 

Comes complete with all the necessary sponges and instructions.