Bright handmade Christmas balls are simple and easy to make. Wrap an old Christmas ball or any plastic ball with a square piece of colorful decorative fabric in colors that match your Christmas tree decorating. Use the rubber band to hold fabric.
I have A LOT of christmas ornaments. This would be totally socially acceptable to do as something other than tree-shaped for a year-round decoration, right? (How-To: Christmas Tree Ornament Mobile from Not Martha)