WATCH: Grandmother has the best reaction to using virtual reality for the first time

Virtual reality (VR) is a relatively well known idea, but not widely used.

Google have been trying to encourage people's interest in it by introducing Google Cardboard, which allows people to cheaply assemble a VR device at home using a few readily available parts and a smartphone.

Youtuber Mark Nutt decided he'd let his Grandma experience VR and the result is brilliant.