阅读短文，回答下面的问题。

    It's Sunday today. The weather is fine. John and Tom are in the park. It is a big park. They can see many people there. They come here to have a rest. Some boys are playing football on the grass. Some girls are singing and dancing. An old man is reading newspapers under a big tree. A young woman and her little son are playing with a toy car. How happy they are!