The basic idea was a kind of a classical handicraft: sculpturing.
Starting from the basic block and working on that till the desired shape.
In this case, the shape is the world. Perfeclty rounded represents that even though using handicrafting you can achieve a very precise result.
And also is a "not finished" work, meaning that the world is still in progress.
All that in a simple presentation, simple forms that can combine and be applied with other partners and also with Unesco logo.