The Earth Cube is a globe-like 3x3 rubik's cube with the continents as a relief above the sea. The cube has to be built around the core of a maru mini cube, available at Deal Extreme ( http://dx.com/p/20017 ). All the parts can be clicked together, there is no glue needed. Though it might be needed to shave down the maru mini core and loosen the bolts.
The globe is 56mm high incluiding the stand, the earth itself has a diameter of 32 mm, making it a scale of 1:4.000.000.000.