"Cardboard puts virtual reality on your iPhone. The Google Cardboard app helps you set up a Cardboard viewer and includes a few experiences to get you started:
* Explorer: Explore exciting environments.
* Exhibit: View 3D objects from a museum collection.
* Urban Hike: Take a hike through iconic cities around the world.
* Kaleidoscope: Enjoy a fun stereoscopic take on the old classic."