Super simple! I bought 4 different sized grape leave wreaths from Walmart or Michaels. I stacked them according to size. I tied them in a few different areas with hemp twine also from walmart. You could also wire this together with floral wire. I chose to use twine for safety reasons. We don't want any babies getting stuck with a stray wire. Then just layer it with comfy layers. I used a layer of burlap in between two other more comfy fabrics.
