apologies for the audio
I usually relax on the couch next to their play pen and I turned to my right and caught her in deep sleep dreaming.
as for pen set up, I couldn't make a proper den so I converted a pet store cage and made it into a den/ hide/ nest, they don't stay in there as I've taken off the Door of the cage so they can roam around whenever they want, also the bottom is just flat plastic as they like to lay in the floor of the den of they get to warm)
the pel is 74" length and 42"
by Soft-Kale-1965