W: Frank, what’s your hobby
M: I don’t really have one. I suppose that bowling is the closest thing to a hobby that I have.
W: How about the other people in your family
M: Well, my son likes collecting stamps and my wife has a garden. She spends mi hour or so every day working in it. How about you
W: I have several hobbies but collecting coins is the one I like best. I have coins from almost every country. My favorite one is from China.
M: Have you ever been to China
W: I want to someday. So far I’ve been to Canada, Mexico and Japan. Why don’t you have a real hobby Are you lazy
M: I like bowling but it’s kind of expensive. The real reason I don’t have a hobby is that I don’t have the time.
W: Oh, come on, Frank. You aren’t that busy, are you
M: Yes, I am. There just don’t seem to be enough hours in the day. Being a traveling salesman is harder than you think, Sue. You know last week I was in Washington and before that in New York. And next week I have to go to Chicago.
W: It does sound like you’re pretty busy. I guess it’s better just to stay here in the office. At least I get to go home at 5:00 every’ night.
M: That’s a lot better than 9:30 or 10:10 or sometimes even midnight.

What’s Frank’s son’s hobby().