We've got balls!
But he brought us some plastic balls so we could run and play together in the room! They work almost like our wheels: we enter inside, Papa closes the cover, and we start walking.
But you know what? While the wheels don't move, THESE BALLS ARE ACTUALLY GOING SOMEWHERE!
At the beginning I was a bit afraid because I didn't know how to drive it and I was spinning without moving, but now I can go wherever I want. I like crashing against the walls and against Nana's ball! However, I get tired soon and after a while I ask Papa to let me go back to my cage by crashing once and again against my cage's door.
Nana and Coco don't seem to get tired of running.