I was lucky enough to see this wonderful film at the Bath Film Festival, having dragged two friends along as well. We all agreed it is the best film we have seen for ages.
A film for adults (and a 12 year old can be an adult), no cameras tricks/ CGI/ gory scenes, a simple story of two remarkable men, one of whom just happened to become the King of England - by accident. There are inaccuracies (Churchill was not a friend of George VI until after he became PM) and some scenes which do not ring quite true - the two men arguing in the park for example - but colin Firth is simply marvellous, as is Geoffrey Rush (and indeed, all of the stellar cast).
See it and laugh with, and weep for, a man pushed into a position he did not want, with a crippling handicap to overcome, but who became in the words of many, an ordinary hero.