To my great relief the polar bear seemed to enjoy herself today, at least as long as I was watching her. Maybe the cold weather cheered her up? She played with enrichment items, threw them up in the air and performed some beautiful playfights with the male in the enclosure.
One funny little incident:
The two bears played with what I thought looked like a piece of cloth, a rug or something like that. After a while the male decided that he was tired of the toy, took it in his mouth and threw it right out of the enclosure, hitting some visitors.
It turned out to be an ox-tail.