Ball to Dice (Red/White) by Mr. Magic

Ball to Dice (Red/White) by Mr. Magic 

The magician shows two sponge balls, one red and one white -- one in each hand. The red ball is placed over the white ball into one closed hand. He waves his other hand over the balls. When the closed hand is opened, it is seen that both balls have now melded into a solid white die with red spots!