MILWAUKEE (CBS 58) -- The Milwaukee County Zoo is offering a full week of free admission for all visitors at the end of December. 

Frosty Free Week will be held Monday, December 24 through Tuesday, January 1. 

The Zoo’s many snow-loving animals such as the snow leopards, polar bear, Snow Lilly, as well as the caribou and elk herds are most active during the colder temperatures. Feel the crunch of snow beneath your feet and the fresh snow on your cheeks when you visit the Zoo’s North American river otters in their year-round outdoor exhibit, Otter Passage. You won’t want to miss these lively and animated animals as they slip, slide and frolic in the snow!

When a break from the chill is what’s in order, step inside the Small Mammals, Aviary, Aquatic & Reptile Center and Stearns Family Apes of Africa buildings to get toasty-warm!

Several of the Zoo’s animals are celebrating birthdays close to this event, so don’t forget to wish them a happy birthday! In the Small Mammals Building, Mira, a female three-banded armadillo, celebrates her first birthday on January 8! Over in Big Cat Country, Scruffy, the hyena, will celebrate his 20th birthday the same day. Tilly, the Gentoo penguin, will celebrate her second birthday January 4. 

‘Tis the season for a wintry visit to the Zoo -- don’t forget your boots and mittens! During Frosty Free Week, the Zoo is open Monday through Friday from 9:30 a.m. to 2:30 p.m., and 9:30 a.m. to 4:30 p.m. on Saturday and Sunday. Regular parking and concession fees apply.