Zoo polar bears enjoy snow day

December 21, 2011 7:26:02 PM PST
The polar bears at the San Francisco Zoo got a special treat Wednesday.

Workers blew 10 tons of snow into their exhibit. It was donated by the San Francisco Ice company.

The bears spent the morning romping and playing in the powder.

The zoo says it's also designed to encourage the bears' natural behavior, keeping them healthy and happy.