Is there a doctor in the house?

Yesterday we had Addy's 3rd year checkup.  Once we got to the exam room there was a doctor's stool on wheels.  Addy climbed on up on it, sat down and said he was the doctor.  So I asked him a few questions as if I was a patient and then I asked him what he was doing next.  He said, "I'm going to a meeting with other little doctors like me".