The snow works brilliantly as a frame for this colourful approach to the film. It makes the compositions so much stronger and more graphic. It also invites you to explore interesting angles and ways of telling the story. There's a crane shot in the film that takes full advantage of the tell-tale clues that blood-trails can leave in the snow. Snow, of course, is a great visual metaphor for our attitude to childhood in a way - a shroud of purity over a mysterious, darker inner world. We were amazingly lucky with the weather and fabulous location. Bright blue skies, snowy fields - a perfect child's Christmas.