Effect:
 The mentalist pours the wooden ball in the color that the viewer has chosen from a vase. Then he takes a small wooden tube out of his pocket and pours the remaining 3 wooden balls out of the tube.
 There are 4 colored wooden balls on the table: yellow, blue, green and red. Now he asks the viewer to think of a color. The mentalist reads the viewer's mind and puts three balls in the tube and then back in his pocket. The color imagined by the viewer is in the vase. He asks the viewer what color he thought of. Then the mentalist pours the wooden ball of the same color out of the vase. Then he takes the wooden tube out of his pocket and pours out the remaining 3 wooden balls.