High quality, hands-free virtual reality doesn’t have to be expensive, as proven by the Zeiss VR One virtual reality goggles. As explained in the above video, the Carl Zeiss optics help users simultaneously see real and virtual worlds. One simply slips his smart phone into a tray (iPhone 6, Galaxy S5 and S6) to turn it into a virtual reality headset. Or, print your own tray for the LG G3, Samsung Galaxy S4 or S6, or Nexus 5. At $129, this is a low-cost way for a consumer to view high-quality 360 degree videos, play games or fly drones and control robots by simply moving one’s head.