An acquaintance of mine who is a physician told this story
about her then-four-year-old daughter.

On the way to preschool,
the doctor had left her stethoscope on the car seat, and her
little girl picked it up and began playing with it.

"Be still, my
heart" thought my friend, "my daughter wants to follow in my
footsteps!"

Then the child spoke into the instrument: "Welcome to
McDonald's. May I take your order?"