I had that cage for a while. I personally hated it. So hard to clean and decorate! I ended up selling it and putting the money towards a Ferret Nation. It was about as tall as I am though, and definitely tons of room for one. Why is Ollie alone though?
I'm working on getting him a buddy,I would have a smaller cage,but my cousin used to have a ferret,so I cleaned up his old cage
and yes,he just learned how to go up and down the tube(he used to stay on the second to the tope level,then he learned to use the ramps,so I moves his food/water to the bottom so he cout learn to use the tube=p