Where are the speakers?

M: Mom, may I work at the zoo?
W: Work? Where?
M: We have a chance to work at the zoo for the whole holiday. All my classmates are going. Can I? Please?
W: Sounds interesting.
M: Does that mean you are letting me go?
W: Yes. But how about a favor from you in return when breakfast is over? Go and practice cleaning cages by starting with that cage you call a bedroom!