They both love the very top and will nap there or use it for bird TV watching. It took a while, but Leo started using the second shelf a little bit, not a lot, but a little. As shown in our new gif:
It's a good spot for waitin' for bugs to show up on the screen..
I'm outta here!
So Greg and I set out to change this situation. I'm going to take the next few days to show off out attempts at getting Leo to realize the fun of the bottom tube!