Louis has been obsessed with the various community helpers. He will rush to the window when he hears the thrilling sound of ambulance, fire engine and police car. He will stop the policemen or postman on the street and says hello. If they are in a distant, he will wave to them until he is seen. The doctor-and-patient game is also one of the games he likes to ask Kristen to role play with him. Mama usually gets the role as his assisting nurse.