Use a clean plastic lid from a jar, glue, glitter, pom poms, chenille stem or ribbon.
Back of ornament. We used one of Emme's old paintings (that happened to be covered in glitter.) We used it on the inside of the lid and on the back. We just cut it out and glued it on.
Glue your scene on the inside. We chose to make a snowman. A Christmas Tree would be cute, too.
We received the Pom Poms and Glitter Sticks (Chenille Stems) from http://www.craftprojectideas.com/