Twin giant pandas Rui Bao and Hui Bao celebrated their third birthday on Tuesday at Everland's Panda World in Yongin, Gyeonggi Province, in what is expected to be their last birthday in Korea. Everland held a birthday party at the pandas' second house, where zookeepers Kang Cheol-won and Song Young-gwan joined some 30 invited fans to celebrate. The zookeepers prepared a large birthday cake made of bamboo, while Song presented a handmade wooden bench for the sisters to sit on together. Born July