While Facebooks virtual reality effort involved a multi-billion dollar purchase of Oculus VR, Googles gone with a decidedly simpler route: cardboard. Following the end of its Google I/O keynote, Googles put out an app called Cardboard that lets users slot their Android device into a do-it-yourself cardboard viewer. When looked through using special lenses, you can interact with various Google services like a VR headset. This is low cost virtual reality