The parents are discussing the issue that is happening with the nursery. He begins the story at the beginning of the rising action, but backtracks a little to the exposition through the dialogue of the parents. Technology comes into play by the parents explaining how the machine controls their life.
The children become reliant on the nursery machine for attention and care. They see the machine as their caretaker and it hurts their relationship with their parents. Technology is taking over the family. The kids seem to completely disown their parents in favor of spending their time with the nursery
Technology threatens the relationship between the kids and the parents. This grows the parents desire to have a better relationship with their kids. The kids only want the parents to leave them alone. This causes the parents to take away the technology, which causes the kids to go completely against their parents
Takeaway About Tech
The kids go back into the nursery and call the parents in. The close the doors on the parents, stuck with Africa. The parents are stuck in the nursery, and they cannot get out. The Technology goes along with the kids, and keeps the doors locked in set in Africa.
The parents are presumably eaten alive in the nursery by the lions. The kids talk to Mr. McClean in a very creepy way. Technology brought wrath onto the parents in the room. You can assume that the house was sided with the children. The technology want to live, and cared for it's life more than the parents life.
Humans should not become reliant on technology that has the ability to completely go against its purpose. The technology sided with the children and chose it's own digital life, over the parents biological life