Hong Kong-born Grandfather Kam Wah Chui, 77, used to manage a bustling Chinese restaurant in New York City's Chinatown. Now retired, he spends a lot of time shopping, prepping and cooking for his wife, kids and grandchildren (15 people in all) every day! He teaches Mo Rocca how to make some Chinese delicacies, including stuffed whole fish, roast pork, and tofu with vegetables. He'll also give Mo a primer on the ancient art of Tai Chi.