I use natures miracle, we have some kind of orange Oxy version of it and we were trying to use a painters tarp (large sheet of clear plastic) and cut it to fit the area. The blue tarps also tend to unravel when cut.
Added a couple more pictures of them playing to the album.
Sophie is going to the one down the hall more frequently now too. If she misses that one it is on a stone floor, but she also has not missed since the first post. We have been checking frequently.