Tutorial: DIY Tissue Paper Pom-Poms this tutorial is pretty good. Use square sheets or tissue for a rounder Pom Pom. Tie the middle with ribbon and tied several on ribbon and hung them for a backdrop. Use thin tissue paper and fluff gently.
Tutorial for how to make miniature decorative bird cage - interesting technique with sticks stuck into styrofoam - easily modified for realistic cage. Good because I never have birdcage just laying around.