This is the sweet moment a group of baby penguins enjoyed playing in snow at a zoo in China.Footage shows the adorable flightless birds - one of them wearing a cute orange backpack - waddling on the ice at the Harbin Zoo in Heilongjiang province on January 2. The playful creatures also went 'sledding' down a snowy slope to the amusement of tourists.Visitors flocked to the provincial capital Harbin to witness its 39th Ice and Snow Festival that started on January 5.