Google Cardboard gives you Virtual Reality

First there were stereoscope



...then a viewmaster




Now the Google Cardboard VR viewer


Grandma on a VR roller coaster
http://mashable.com/2015/12/27/grandma-virtual-reality/#yxDuLxX1jEqd

The version I bought
http://www.amazon.com/gp/product/B018G1CJ3U?psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00

Some of the best apps
http://www.greenbot.com/article/2887272/android/the-best-google-cardboard-vr-apps.html

Medical uses
http://www.cnn.com/2016/01/07/health/google-cardboard-baby-saved/