T'ai chi ch'uan is a type of exercise that comes from China. It's like a really cool dance that's really slow and graceful. When people do t'ai chi ch'uan, they move their arms and legs in a certain way and breathe in and out very carefully.
T'ai chi ch'uan is kind of like a game of follow the leader, but without the competition - everybody just moves together and enjoys the flowy movements. Doing t'ai chi ch'uan can help people stay healthy and relaxed, and it's also really fun to try!