The two words Bradbury uses repeatedly in this scene are "The beetle". The repetition adds to the suspense of the scene. Each time "the beetle" is repeated the reader can feel the car getting closer and closer. Because the sentences are very short and similarly structured, they speed up the pace of the scene just like the car is picking up speed.
"We know you say you have a lot of money, so give us just a little and we will leave you alone." I chose this cause it sounded like they asked for a hundred pounds when they could have asked for more, and sounds like they are coming back. Hope this helps!
A child's oral vocabulary is closely related to some forms of poetry depending on the age.