One day, I called home and decided to play a prank on my children. They all know my voice and respond with about the same level of enthusiasm once they can identify that I am the one calling.

 
Of my children, the most outspoken is the middle one - my eldest daughter , who at this time was about 11 years old. She was the one I chose as my target and as I hoped, she was the one who answered the phone. The discussion went as follows;

Me: (with my voice modulated a little) Hello

Daughter: Hello, good afternoon. May I know who is speaking?

Me: My name is Peter, I am your mum's friend, may I speak with her please?

Daughter: (There was a pause as she tried to figure who this is) Errm, sorry, who did you say...