What you need:
- 1 old shelf or any suitable plank or board, or even an old cabinet door
- 4 baked beans cans, washed, with labels removed
- 4 screws (optional)
You can screw the cans to the underside of the shelf's four corners for extra stability. I didn't; I was lazy. I just placed the four cans on my table and rested my shelf on top of it. The wires went neatly under the shelf.