Each day brings something new in the enclosures. The cubs are free to plan their own days and nights, and that’s what they do.
Now we have a series of photos that show a group of cubs and how they sleep (or don’t) during the night.
They are busy, even during the night. It’s OK, though, they can plan their days and nights, eat when they want and sleep when they want. And that is exactly what they do. We just get to enjoy watching them.