It won't work. Not right now.
I bought 12 blank signs from Smith Printing, and duct-taped ten together (for 24 square feet) on the inside so Charlie couldn't get a purchase on those chewy edges.
The enclosure just makes him frantic. No harm done, but no go for him.
However, I plan to keep it around. There might be uses for it later. It folds down to 18" x 24" x 2-1/2".
It would do, I think, everything that the Grrreat Wall can do at 1/5 the cost. So, for a small kitten or puppy or rat, or guinea pig, or young birds, it might be a dandy playpen. Worth trying, anyway.