I would get some small cups and plastic chain. I would hang them from the roof. then put a few treats in the cups in evening so they have something to forage for at night. doesnt have to be much just a few dried mealworms or dried papaya or yogurt drops.
I actually have the cups that came with the cage and I have a bunch of the chain links but wasn't sure if the 2 fleece ropes would be enough hanging. ..