How Elevators Know Which Floor

Iris Fennimore

Press the button and listen: a building wakes up, a hidden room hums behind the wall, and a brain made of switches decides whether you go up or down. Iris Fennimore's step-by-step mystery explains real elevator mechanics through secret rooms, counterweights, and the language of bumps and beeps. Best for curious six- to ten-year-olds who take apart how things work. Duncan Winslow reads with the patient clarity of a good teacher, pausing just long enough for young listeners to picture each moving part before the next one clicks into place.