My quest should turn up in the next week or so and my grandmother has said that she would like to take a look at it. 
Being almost 80 years old I would like to get some recommendations for experiences that would impress her. Obviously games are going to be out of the question, as are things where you have to walk around but if I could do something like have her sit in her chair, put the headset on and suddenly she's on mount everest or under the sea I'm sure she would love that. 
I'm scouring the stores in advance myself but any recommendations would be hugely appreciated.