Two professional sculptors Brendan Jamison and Mark Revels have organized the Sugar Metropolis project, which may be the sweetest project in the world.
In the process of building a sweet metropolis, the sculptors and
everyone participating are using refined sugar cubes. The feature of the
project is the fact that it does not have a permanent place of
residence. The sculptors travel around the world and invite people to
build a unique city.
Source - http://www.brendanjamison.com/