I figured when I have my new pup in the office room with me and he isn't in the crate, I'd put him in one of those play pen areas. That way I can sit in there and play with him too. But since that room has carpet, I was thinking about getting some kind of temporary plastic floor stuff (like office floor mats) but easy enough to roll up and put away but big enough to cover the whole play pen area. This way I can easily clean up messes. The pen offers about 18.5 sq feet of space. Any thoughts on this or where I can find something like this for cheap? Maybe home depot?