I had a room that needed a little something along the lines of a chandelier to hang in it. I ended up making a mobile to hang from the light fixture:
Materials: paperboard, paper, paint, wire. Tools: pencil, scissors, paintbrush, needlenose pliers. The ball in the middle is a sheet of paper that I crumpled, wet, and kneaded...basically a large spitball. I left the edges of the paperboard rough and didn't try hard to evenly space the circles.
The mobile's shape is based on a mobile that my grandma had at her house; hers was black and red, and smaller. The form is also vaguely (and inaccurately) atomic, which ties in with my physics background. The mobile catches the light from the high windows well.