Final answer:
Stanley continues to lie to his parents out of guilt and the need to wear a mask. This behavior affects the whole atmosphere of the home.
Step-by-step explanation:
Stanley continues to lie to his parents because he feels guilty and needs to wear a mask in front of them to hide his true actions. In the play 'A Doll's House' by Henrik Ibsen, Helmer explains how a guilty man has to lie and play the hypocrite with everyone, including his own family.
Stanley's lies infect and poison the whole atmosphere of his home, affecting the lives of everyone in it. This is similar to how Willy fails to communicate with his sons in 'Death of a Salesman' and how secrecy and not following instructions can lead to their downfall in 'The Veldt'.
Stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. When Stanley was younger he used to play with stuffed animals, and pretend the animals were at camp. Camp Fun and Games he called it.
Stanley's father is the third Stanley Yelnats. He's an inventor, though his inventions are never very successful. He claims not to believe in the family curse but he also regularly blames mishaps on Elya Yelnats.