根据短文内容回答问题。

Everyone in Mr. Brown's family is going to be busy this weekend. On Saturday Morning, Mr. Brown is going to the bank. Mrs. Brown is going to buy some food. Their daughter Ann is going to do her homework. Ann's brother Tom is going to do his homework, too. In the afternoon, they're going to visit Ann and Tom's grandparents. They're going by train because Ann and Tom's grandparents' home is far from theirs. They're going to come back home on Saturday afternoon.