This document provides an overview of virtual reality and Google Cardboard. It defines virtual reality as artificially creating sensory experiences that can include sight, hearing, touch and smell to replicate a real or imagined environment. The document discusses the origins of virtual reality from 1939 and how Google Cardboard works using a smartphone inserted into a cardboard viewer. It also profiles other VR devices like Oculus Rift, Samsung Gear VR and Microsoft Hololens. Finally, it poses ideas for how public libraries can utilize VR technologies like Google Cardboard, Mattel View-Master and gaming VR systems.