This is really interesting.  Talk about saving on transportation costs. :)

Designs have been revealed for a building that can be set up on the Moon using 3D printing technology.

Devised by architects Fosters and Partners, the lunar residence would begin life as an inflatable structure sent from the Earth that once deployed could be strengthened in to a viable living space using components produced using 3D printers. Small robots would operate the devices using soil from the lunar surface to produce the materials. The resulting building would be able to house up to four astronauts.