I started with a "brooder kit" which was a box and it had a plastic tub at the bottom, that lasted about 1-1/2 weeks, then I went out and bought a hard plastic kiddie pool, which was great for about the same, but had to add cardboard around the sides to keep them inside. I started to notice they were getting bored as they were shredding the paper towels I had over the shavings.
Today they moved down cellar I kept the kiddie pool, but added sticks from trees to raise the ceiling, and added garden mesh ( you'd use it on grapes and bushes etc. to grow on) over the top, and added a big old stump in the middle. Prior to this they'd have to dig though the paper towels to get to the shavings, the new digs only have shavings. They are SO happy, peeping and pecking at the stump and being able to fly around, flap their wings and kick all the shavings.
My inital thought was to get a cover you would put over a baby play pen, but I wasn't able to find that, and went into the garden center to look to see if they had any type of screens, and that's when I found the mesh. I put the food and water up on upside down hamburger containers so the shavings wouldn't get in. They quikly figured everything out and I kept their "safety zone" where they always have slept, (basically the roost that came with the kit and the therometer)