Plant pots have holes to string the string through, hey!
Woke up early this morning to find him completely encircling that four-inch cage, tail and head out of sight on the far side, his rear towards me. He had no idea.
Reality hit when I opened the door a few feet away, squirt gun going. He freaked and landed on the wooden box, not far of a fall and onto a surface with some give (phew!), but it made for a loud landing and wild scrambling and a lot more respect for boundaries.
But to be sure. I threaded the edge of a paper plate to hang above the left side of the pot where I think he managed to climb down it on. I only wish I had the ability to motion-sens0r video whatever he’ll do next.