Santa's deer are used to the sound of bells, so it is easy to extradite Santa Claus by hanging a bell at home, so as to receive gifts.
The story about Christmas bells
The old man is a symbol of Christmas. The legendary Santa Claus will drive a sleigh pulled by reindeer on Christmas Eve and deliver gifts to thousands of families. However, with the continuous progress of human society, no one believes in this long-standing legend, and no one believes in the existence of Santa Claus. However, the little boy Klaus (voiced by josh hutcherson) doesn't think so. Although his parents and friends around him told him that Santa Claus is just a fictional character and he doesn't exist at all, Klaus insisted on believing in the existence of Santa Claus. Therefore, Klaus was often laughed at by his peers, but he never wavered in his belief.
Finally, Klaus' persistence won him a reward. On the eve of Christmas, Klaus fell asleep in a trance. Suddenly, the floor began to tremble, and the utensils on the table rattled. With the whistle blaring, a mysterious train stopped in front of the door. He nervously opened the door and saw a kind conductor (voiced by Tom Hanks) standing in front of him. The conductor invited him to travel by car, go to the North Pole to attend Christmas celebrations and visit the legendary Santa Claus. Klaus was so surprised that he agreed nervously. After Klaus boarded the train, he found more friends. Everyone was very happy together and had an unforgettable journey.
Finally, the train arrived at the terminal, the North Pole, and the children jumped off the train happily. The Christmas celebration in the North Pole City officially began, and everyone was immersed in a happy atmosphere. At this time, a Santa Claus came up to Klaus and kindly asked him what gift he needed. Klaus mumbled that he only wanted a small bell on the reindeer. Klaus got the gift he wanted, but when he came home, he accidentally lost the bell. He was very sad. Unexpectedly, when he woke up the next day, he found the little bell under the Christmas tree intact. Mother was very surprised when she saw it, but she thought the bell was broken. However, Klaus knows very well in his heart that only those who believe that Santa Claus really exists can hear the ringing of small bells.