You begin by stacking two of the cups together then place one of the identical balls into the second cup and place the third cup underneath hiding the ball. Don’t forget to place the other three balls into the third cup before you go on stage.
When it is time, dump the three balls onto the table in a row with gaps in between them. Place the cups behind the balls with the cup that has the secret ball in the center. You should practice this often to avoid having the hidden ball come out.
To make people that the cups are empty, you tap each of the cups using your wand. Then you begin by placing the ball in the center on top of the cup that is behind it and stack the other cups on top. Tap it using your wand then lift all three cups to show to the audience that the ball has gone through.
Next, you place the cup that has the other secret ball on top of the ball that has gone through the cup. Place a ball on top of the cup with the two balls underneath it and put the other two cups on top. Again, you tap using your wand and show once again that the balls have gone through.
Put the cup with the remaining secret ball on top of the balls that have already gone through the cup.
Now put the last ball on top of the cup that has three balls inside. Put the other two cups on top of the cup that has the ball on top of it then tap one more to show that three balls have gone through.
This magic trick is a little bit complicated than the first but with some practice, you will be able to make people believe that a the ball actually went through the cups.