Thank you all so much for the good advice.
I think what I really, really want does not actually exist. What I really, really want is a tablet on which I can surf the internet, buy stuff, use gnet and FB, access my email and (big problem this) have a word processing programme which I can use for my writing. I also need it to print. So, thingmajig, you have confirmed my suspicions that I need a laptop as well as a tablet. Whether that is an ipad or something else is still perplexing me but only because of the cost. Still, what the h**l, it can come out of the children's inheritance - they both already have ipads!
janeayresister - I had the same teaching idea as you when I once lived on an island for a while. I quickly found I was in danger of becoming patronising as all the senior citizens I met were committed techies and needed no help from me!
Do you still have all your own teeth?