The lego feast describes the setting, which sets the mood of the story. The Hadleys are spoiled, in a way that robotics do everything for them, like the serving robot in the picture.
This shows the theme of revenge, because they wanted revenge from their parents, even what the parents did wasn’t really a bad thing. They over reacted in a way that they went dramatic measures to get revenge, (killing their parents) for a small incident.
This image represents greed, as of the kids being greedy to be with the technology. They also keep on spending money to get what they want, and sometimes more than they want. The image shows “forcefully” taking the money out.
This shows the spoiled kids, because the parents spent tons of money to get what the kids wanted, but the kids want more, and want less of their parents. The parents made the mistake of getting the robotics, which has it’s pros and cons. The cons are that the parents interact with the kids less, meaning the kids don’t need their true parents because they had the robots.