Nicole Richie & Joel Madden Enjoy a Family Day at the Zoo

updated 05/16/2012 AT 5:30 PM ET

originally published 05/16/2012 AT 4:00 PM ET

Nicole Richie is going wild Down Under.

The star, who is in Sydney with husband Joel Madden, a judge on The Voice Australia, spent a family day at the Taronga Zoo with children Harlow, 4, and Sparrow, 2.

They met a friendly giraffe and took turns feeding the animal carrots by hand. Both young and old seemed thrilled by the encounter: The children were googly-eyed, while Richie looked awed as she took photos of the giraffe on her phone.

Later, the group had a special meeting with another zoo resident, Yindi the koala.

“Thanks [Taronga] Zoo for having us today with the kids,” Madden Tweeted. “They are still buzzing from it. Can’t get enough. We’ll be back fo sho.”

Harlow Madden, Joel Madden, Sparrow Madden and Nicole Richie, with Yindi the koala in the background

Courtesy Taronga Zoo

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