I used plywood (sand well to avoid splinters) and 2x4's, some paint colors I love, stain.
I had to think a bit about the construction of this, mechanically minded I am not. I am so sorry I do not stop and grab my camera when I am in the process--I just get in the zone. I would try to explain it (okay, I did try but it made no sense), but I bet you are all better at the mechanics than I am. If you need help, email me :).
I added some wheels, some feet would work too, but I liked the industrial look the wheels gave it.