Left image: A box of building blocks, secured by the seatbelt in the backseat of a car.
Right image: A person sitting in the backseat of a car, not wearing a seatbelt
The image is ironical, as an inanimate box of building blocks has been secured by the seatbelt in the backseat of a car, while a person sitting in the backseat is not wearing the seatbelt, while the person would actually need the seatbelt in case there is an accident.