Display a plastic cabinet, a die and a top hat or container.
Take the 'Die' out of the hat, the hat is shown completely empty.
Put the 'Die' in the right side of the box.
Now close the doors and tilt the box slightly to the left.
They hear the 'Die' slide!
Open the right door, the 'Die' has vanished!
The kids yell and scream "You just slid the box"
Close the door and the 'Die' comes back!
The kids yell and scream again!
Have some fun with the routine for as long as you want.
Finally you open ALL FOUR doors, the 'Die' has vanished completely!
Now reach into the top hat, and produce the 'Die'