5-20 empty picture frames (be sure to get a variety of sizes, shapes, and designs around the edges)
2-4 cans of white spray paint in semi-gloss finish*
Before painting your fames, go ahead and lay them on the floor and play with the arrangement until you get it the way you want. Then snap a photo to reference back to when you begin the hanging process. (My arrangement changed a bit. I broke one and then another one wouldn't take the paint)
Lay out a large piece of cardboard to lay your frames on for painting.
Spray the frames with 2-4 coats of paint or until they are completely and evenly covered.
Once dry, begin hanging your center frame(s) and work your way out. Be sure to refer back to the photo you snapped earlier. Or feel free to hang as you please for a less uniformed look.
*As always, I like to mention that you can pick any color that you prefer or that may better suit the room you are doing this project for. Same applies with the finish of the paint.