How refreshing to have a Disney film that doesn't end with a marriage! There is much to entertain and please adults in this show but your six year olds may need the stamina for a two and a half hour spectacle with brilliant singing and performances.  However many will be pleased that the scary Marshmallow monster does not figure in the UK musical.  Casting Samantha Barks and Stephanie McKeon with their acting ability and contrasting singing voices is a master stroke.