Google Cardboard is a project that lets you turn any Android 4.1+ phone or iPhone into a Virtual Reality (VR) headset!
Full details and instructions of how to make a cardboard viewer can be downloaded from the Google Cardboard website. Alternatively, low-cost kits or ready-made viewers can be purchased.
Features and Applications
Google Play provides access to the free Cardboard app to set up a viewer and play sample VR videos. There is also a free Cardboard Camera app which enables you to take your own 360 degree panoramic video to play in the viewer.
Activity: Make your own modern smartphone version of a Victorian Stereoscope and personalise it by adding your own graphics.