Bao Bao takes a bow

Bao Bao, the four-and-a-half-month-old giant panda cub, trains with an animal keeper at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.

Bao Bao, who now weighs 17.38 pounds, was born to the zoo's female giant panda Mei Xiang and male giant panda Tian Tian.

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Bao Bao trains with biologist Laurie Thompson at an indoor habitat at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.

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Bao Bao, left, makes her public debut as her mother Mei Xiang eats bamboo, right, at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao is carried by biologist Laurie Thompson past photographs of her parents before being weighed and measured at the Smithsonian's National Zoo, Jan. 7, 2014.

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Bao Bao looks at a plastic ball as she trains with animal keepers inside her habitat at the Smithsonian's National Zoo, Jan. 7, 2014.

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Bao Bao makes her public debut at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao makes her public debut at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao is carried by animal keeper Marty Dearie after she was weighed and measured at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.

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News photographers take pictures of Mei Xiang, the mother of Bao Bao, as she eats bamboo at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao makes her public debut at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao crawls in her indoor habitat at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.

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Bao Bao makes her public debut at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao looks towards her mother Mei Xiang, as she makes her public debut at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao has her right forefoot measured at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.

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Bao Bao makes her public debut at an indoor habitat at the National Zoo in Washington, Jan. 6, 2014.

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Bao Bao is approached by her mother Mei Xiang in their indoor habitat at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.

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Bao Bao, the four and a half month old giant panda cub, nibbles on her mother Mei Xiang in their indoor habitat at the Smithsonian's National Zoo in Washington, Jan. 7, 2014.