M.B.
We purchased the Superyard XT when my son was younger. We've used it indoors and out as well as putting it around the fireplace in winter when he was younger, the Christmas tree, and to fence off the part of the house where we remodeled last year. After my son was old enough to not need it, we used it for a puppy pen for a bit. It costs about $65, and you can purchase extenions for it to make it bigger. You can change the shape of it to fit the area you need as it hinges at each 3 foot (i think) section.
Also, when my son was a baby I was able to hook certain play toys to it with those little plastic chains the sell to hold toys to strollers, car seats, etc and he loved crawling around to see each one.
You can do an internet search for it, find it at Babies r Us, etc.