A new ESA-led project is investigating the ways that 3-D printing could be used to create and run a habitat on the Moon. Everything from building materials to solar panels, equipment and tools to clothes, even nutrients and food ingredients can potentially be 3-D printed. But if you were headed to the Moon, what would you want to 3-D print, to turn a lunar base into a place that feels like home? Tell us your idea, to win a chance of actually getting it printed.