They are getting a lot more comfortable moving around outside of the pen. Every time I clean they are running around having fun. I've put some toys out for them to play with, and of course they love getting into trouble whenever possible. So far the wire grid has kept them at bay. They can easily hop over it, but haven't tried yet. It took about 30 seconds for them to realize they can fit under the sofa.... so if in doubt... that's where they are. Probably won't fit under there this time next year, will have to come up with something else. Maybe a corner hide box for when they are out of the pen.