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.

Mark's Grandma was watching a VR roller coaster simulation.

The excitement (and hint of fear) is infectious and we think some VR gear is already on our Christmas list for next year.

You can lean how to make your own Google Cardboard HERE.