How do the children's character traits contribute to the conflict of the story?
The two children, Wendy and Peter, have been spoiled by the house and the nursery—as well as by their parents, who let them have whatever they want. This has made them stubborn, dishonest, and willful. They expect to have their own way in everything.
This leads to the central conflict in the story. The children consider the nursery more a parent to them than their real parents. To the children, the parents are simply an obstacle in the way of their desires.
This conflict grows more acute as the parents become more and more alarmed about the veldt scene in the nursery. Mr. Hadley realizes the children have been spoiled and that the Happylife home has been a mistake. He decides that children are like a carpet that needs to be stepped on sometimes for their own good. He shuts down the nursery and locks it, which enrages Peter and Wendy. Since the children have not been taught to respect their parents and are used to getting their own way, it is easy for Peter and Wendy to lure their parents into the veldt to be eaten by the lions.
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