How about Charlie Manson and Susan Smith?
Mary Poppins and Steve (croc hunter) Irwin 
I think using Mary Poppins is a bit transparent- it would be so obvious that you were answering what you thought they wanted to hear as opposed to what you would really want.
No really? 
just to be different. how about inviting your new boss and five beautiful people of the opposite sex. Of course if he or she is gay then your fired before your hired. Forget that one. Invite six homeless people. That can’t hurt any job interview. Yah, but then your stuck havin dinner with 6 homeless strangers. That could open a whole new can of worms…maybe right there at dinner. Forget I said anything.Try one of the others in this group, they seem like nice people.just to be
Boyo, I’m thinking being literal and anal about language is not what they’re looking for in a nanny. Or maybe it is, since a child can pick up a lot of things from a nanny.
Interviews shouldn’t be where you say what you think they want to hear.
They should be where you’re honest about who you are and your hopes for the job, and they will then choose the right person after hearing the facts from everyone.
If they then do not choose you then you probably either wouldn’t have enjoyed the position anyway, or at least they got a person who suited the job more perfectly, which is the intention of an interview anyway.