When Spaghetti was younger, his desire to climb inspired me to turn the side of the tank into a climbing wall out of suction cups. The pet store had hardly anything for climbing needs. He loved it, and easy to move around to create new climbing challenges. Could really see him working his whole body. These suctions cups came with hooks on them, which I removed because they didn't seem safe, something to consider. It's fun coming up with new ways to engage him.