Indoor rabbit enclosure design:

Start with a screen door kit (available at most hardware stores).

Use a hacksaw to cut the edges to the size that you want. A two and a half foot tall enclosure is about right.

You'll need a wire barrier. Half-inch to one-inch squares are good.

Insert the plastic corner pieces into the side pieces. A hammer is useful for this.

Once joined, you have one of two frames that you'll use for the barrier wall piece.

Set the wire roll on the frame and mark it so that it just reaches past the inner edges of the frame.

Cut the wire piece (try to cut close so as to eliminate sharp edges as much as possible)

Use the frame as a guide to mark the other edge of the wire and then clip that to size as well.

Place the wire on top of the frame and use zip ties to secure it.

Leave a little bit of slack on the ties at first and get the corners connected.

Once the wire is held in place, pull the ties tight to lock it in. The wire will be under tension when done.

Clip the ties fairly short. If all goes well, the wire won't go beyond the outer frame (this example shows the wire too close to the outer edge).

This is the first of two panels that will sandwitch the wire between them. I placed ties every 6 inches.

As before, get the corners figured out first.

Now for another set of zip ties to connect the two frames together.

Here's what it looks like when done. You can see both the inner and outer zip ties.

Join as many panels together as you like using whatever method you think is best. In this case, I used hinges.

Here's one way to make a lock. Three screw eyes into each of the two completed panels.

Next is a stick (available at most garden centers).

Insert the stick through the screw eyes and you're set.

You can place the enclosure on a spare piece of carpet and then wire the wall panels to the carpet.

And if your bunnies are ripping out pieces of carpet in a corner, just add LOG!.

If your rabbits are escape artists, then a 3-foot-high wall is likely a better option. You can also use
the same techniques to create a top for the enclosure if you want to. If there's no top, be wary of placing
platforms next to a wall (since rabbits will figure out pretty quickly that that's a potential way out -- especially
if there's a ledge on the other side of the wall). The nice thing is that this enclosure design swings open so that
your rabbits can run around and visit with you. It also helps to place an enclosure in a high-traffic area so that
your little critters won't feel left out. After all, they want to know what you're doing and appreciate lots of visits.