Want to go to Mars? You’ll need a place to live first. America Makes challenged people to design habitats for the red planet, and displayed the top 30 finalists at World Maker Faire. Hosts Katie Linendoll and Sam Roberts explored the 3D-printed models—although they were disappointed they couldn’t fit inside.

Popular Science checked out the most amazing, innovative, and crazy projects at the 2015 World Maker Faire in New York City. Watch our complete coverage here. You can hear more from Katie on her podcast, and from Sam on SiriusXM.