Color Changing Rubik Cube by Tora magic

First, you show a Mixed Rubik's Cube to audience and put it in a box.
Then, get The Rubik's Cube out of the box but The Mixed Rubik's Cube has changed into a Solved Rubik's Cube!
Now, put The Solved Rubik's Cube inside the box. This time it changes into a All Yellow Rubik's Cube!!
At this moment, you show The All Yellow Rubik's Cube to the audience to show its is solid.