Mexico City zoo throws a panda party

STORY: Delighting onlookers, Shuan Shuan played with a birthday cake as visitors sang Mexico's birthday song, “Las mananitas.”

Despite their older age, Shuan Shuan and Xin Xin are reportedly in good health. Zoo officials at Chapultepec report these pandas to be the oldest of its species in captivity.

Shuan Shuan’s and Xin Xin’s ancestors came to Mexico in 1975, a gift from China to mark the restoration of diplomatic relations between the two countries.