I recently just built a tortoise table for my little sulcata he's only 5 inches. I made the table out of plywood and is about 4'x4' I left him in there once and when I went to go check on him he was flipped on his back. I flipped him back over, and this time I watched over him. I noticed that he climbs the walls and loses balance and flips over, I have tried to come up with ideas to get him to stop. But none have been working. If anyone could please give me ideas on how I could prevent him from being able to climb the walls and flip over? I will post a picture of his enclosure.