Paper ball tutorial - These are made from 12 slotted flower shapes that fit together to form a sphere. No adhesive needed; the only ingredient is paper. (recycle old Christmas cards for ornaments/decorations)
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.