In case you can't make it to Paris to windowshop in person, I thought you might like a peek at the Chanel window that's currently decked out for the holidays. I love the white palette used throughout the window, and the dolls in their little Chanel suits add a childlike charm to the look.
To create something similar at home, use thick tagboard to create the tree. An exacto knife or hole punching tool will help with rendering the pattern, while sharp scissors are needed to create the undulating waves of the tree. You can use the cardboard tube from a leftover wrapping paper roll for the tree's trunk (give it a quick spritz with white spray paint).
To create the backdrop's doily pattern, try using an overhead projector. It will give you the most accurate results. However, if you're artistic or fearless (or both), you can create the pattern freehand. Start with a white wall and fill in the doily cutouts with either pieces of craft paper cut to size and shape or a contrasting paint color in the palette of your choosing.