How did Jerry spend his weekend?

M: Hey, Paula. Did you have a good weekend?
W: Yeah ... I checked out that new 3D movie. It’s amazing what they can do with technologies these days! How about you, Jerry?
M: I went mountain biking with a couple of friends. We worked up a good sweat and had a good time.

W: William. Why are you speaking so strangely? Like a child!
M: I’m pretending that I’m six years old.
W: Oh, I see. Hmm, that makes you seem smarter than usual.
M: Ha ha, very funny. Well, the reason I’m talking like a six-year-old is that last Sunday, 15 May, was International Day of the Family. So I thought it might be nice to look at some language which is used by children and with children.