A cube is placed in a double compartment box (similar to a die box), and after some sucker by-play, the block vanishes. The two front doors are opened to give the audience a clear view through the box. The two top doors are also opened and the end panels removed, leaving an open skeleton framework of a box which can be shown from all sides. With original instructions. Larger version of this apparatus than what can usually be found, this includes 4 inch blocks. Repaired, working. Good condition.