Back of Glassy Cube by Tora Magic

Vanishes, Transformations, and Mysterious Appearance - This trick has got them ALL!

First you show two glassy boxes to the audience; one contains what looks to be a multicolored Rubik's Cube. You remove this cube, place it inside the other glassy box and, in an instant, the cube changes into two red and yellow balls! The first box is shown to still be empty. However, in the blink of an eye, the cube magically reappears inside that first box.

Includes: Cube resembling a Rubik's Cube, glassy boxes, and balls