Giant panda Kai Kai eats its specially made bamboo cake at Singapore's River Safari on Sept. 6, 2013. The River Safari on Friday held a party celebrating the birthday of Kai Kai (turns six years old on Sept. 14) and Jia Jia (turns five years old on Sept. 3), as well as for the first anniversary of their arrival in Singapore. (Xinhua/Then Chih Wey)