根据短文内容，回答问题。

Every Sunday, Sally goes to buy many clothes. Now, she has four new sweaters, three new skirts and five pairs of new shoes, but she's not happy.

One day, Sally asks her friend Anna, "I have so many new clothes, but I'm not happy. You don't buy new clothes, but you're always happy, why?"

"Oh, dear, I don't think new clothes can make one happy," says Anna." But what makes you so happy?" Sally asks.

"Helping others" Anna says." I often go to the old people's home (敬老院) with my sister Gina. Gina tidies rooms for them and I play games with them."

Now, Sally wants to join Anna and Gina. She says" Can I go with you?" Anna says, "Yes, sure."