Make Christmas tree ornaments from folded paper or old book pages. Add a piece of paper for a trunk. Punch a hole at the top for adding twine or ribbon for hanging. There are many printables you can use, some are Christmas songs - would make a more festive look.
I've made these and saved them for my Christmas Decorations. they are fun to do a very decorative bow at the top and have it wrap downward over the whole tree, or a star for your 'tree topper' and instead of ribbon you could also use strips of Stampin' UP! Designer Series Paper (or decorative scrap book paper).