I built that particular cage into the largest opening of my entertainment center. For tools you need: screws, screwdriver, hammer, drill, staple gun, saw, sandpaper, paint, paint brush, utility knife,

First, I built a wooden tray for the bottom. I used 1" x 4" boards for the sides and 1/2" board for the bottom. I put drawer pulls on for handles. It looks better if you have a miter box to cut angles for the corners, but you don't have to. Then I put floor tiles in the bottom, so it is easy to clean and waterproof, and then painted it all with several coats of oil based paint.

Next, I had two pieces of plexiglass cut, to keep some of the seed hulls inside, and not on my carpet. The one in back starts at the bottom of the opening, and is 8" high. The one in front starts above the tray, and is 4" high. Make sure you pre-drill the screw holes, and drill slowly, or you will crack the plexiglass putting the screws in.

Then I mounted a flourescent light on the top of the cage in the back, and put in the perches. I also put in some curly wood that I found at the craft store, and some silk plants. This works for finches, because they don't chew like a hookbill. I wouldn't recomend it for chewers!

Next, I stapled wire over the rest of the openings. Make sure you get powder coated wire, and not galvanized. Then, I used wire cutters to cut out the opening for the door. I am currently fastening the door closed with plastic zip ties, because I've yet to come up with a better solution.

That's it!