We can't leave Jackie alone unless she is contained. Not only is she rolling but she can scoot. About to weeks ago, I left her in the living room on her mat and went to shower Cali. It took me about 5 minutes to wash Cali, when I got done washing her I heard Jackie screaming. She was halfway under the couch, he lower body was under the couch. We still find her under the couch. I doesn't matter where we leave her she always manages to get stuck under there.