Use plastic bags, cardboard, and duct tape to create your own wreath frame. Gives it that needed shape (roundness) then just wrap and/or glue your decorations and flowers to it. -- Going to be doing this for our Fall Wreath.
DIY: Super fast and easy make-your-own Castle Pinata. We used it for a Knight's party. But it would be great for a Princess party too. The party guests decorated it - then smashed it! Two activities in one.