<human>:  What are some of the most popular Christmas traditions in the United States?
<bot>: Some of the most popular Christmas traditions in the United States include decorating Christmas trees, exchanging gifts, sending holiday cards, attending church services, and gathering with family and friends to enjoy meals and special treats. Other popular Christmas traditions include caroling, setting up Nativity scenes or mangers, making gingerbread houses, and decorating wreaths and stockings.