You can use any shape. It doesn't have to be a bunny. Just trace a shape or cookie cutter. This would be cute for any holiday, just use an appropriate cookie cutter to trace and cut out the shape, then whatever yarn works best for that holiday!
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.
Coeur en bois flotté teinté - Foto "pinnata" dalla nostra lettrice Wonderbaba DIY - How to make a heart shaped wall art out of driftwood or tree branches and twigs. Includes tips on branch selection and shows how to tie branches together.