Boo does not leave his home because he feels that people are cruel because of their accusations and discrimination toward him based on the rumor that he stabbed his father with scissors and was locked in the court room's basement. Jem and Scout accept him because they feel that people in this world are cruel based on their experience with a prejudice jury finding Tom Robinson guilty and other experiences. Boo also left Jem and Scout gifts (watch chain, gum, soap sculptures...) and had also saved their lives from Bob Ewell.
Jem's final statement that makes Scout go along with the plan to peek in the Radley window is when he says, "I ain't going back in Finch's Landing 'til I can bring him with me." This implies that Jem is determined to understand Boo Radley and not let fear dictate his actions, which inspires Scout to join him.
Scout cries after realizing that Boo Radley, whom she once feared and misunderstood, had been watching over and protecting her and Jem throughout their trials and tribulations. This reveal of Boo's hidden kindness and selflessness moves Scout to tears as she recognizes the true nature of his character.
Jem believes anything from the radley place is poisonous, etc so he askes scout to spit out the gum
Makes her go up and touch the front door of Boo Radley's house.
No, Scout and Jem find two Indian-head pennies in the tree, and they suspect that the person leaving the gifts is Boo Radley, not Cecil Jacobs. Cecil Jacobs is a boy in Scout's class who makes fun of her father, Atticus.
"Mockingbirds" in this story are those people characterized by their innocence which is taken away by exposure to some (unnecessary) evil. Boo Radley most definitely fits this description. Arthur "Boo" Radley is an enigma, purportedly once a bright young boy who, as the result of some past event, had been sequestered away and emotionally damaged by his domaneering father for most of his life. He grew to be a misunderstood recluse - though he never lost his kindness. Indeed, it was his humanity that ultimately brought him back out of the house to help and later save the lives of young Scout and Jem. It is Boo's kindness without prejudice, what me know as "innocence," that makes him a mockingbird. In spite of everything, Boo gives with all his heart, just as Miss Maudie explains to scout that a "Mockingbird sings with all its heart." To injure him, as "to kill a mockingbird," would simply be a sin.
Scout cries when she makes a connection between Boo Radley's life of isolation and the societal injustice faced by Tom Robinson. She realizes that both Boo and Tom are victims of prejudice and cruelty, which deeply affects her.
Scout is saved by her ham costume at the end of "To Kill a Mockingbird" when she is attacked by Bob Ewell. The wire in her costume acts as armor that prevents Ewell from causing serious harm, and Boo Radley appears to fight off Ewell, ultimately saving Scout's life.
Scout feels sad because she realizes that Boo Radley had been watching over them and caring for them from a distance, while they had only seen him as a mysterious and frightening figure. This makes her question her initial assumptions about Boo and feel guilty for misjudging him.
Seeing Boo makes Scout see herself differently, and she's not entirely pleased with what she sees. This moment of self-examination suggests that Atticus stopped too soon with his advice that putting yourself in another person's shoes allows you to understand them better - it also has the potential to let you understand yourself.
The kids play different roles like the old Mrs.Radley, Mr.Radley and boo Radley. Mrs.Radley was to sweep the porch Mr.Radley was to walk up and down the side walk and cough every time boo talked to him.
Mr. Radley puts cement in the knothole to prevent any further communication or interaction between Boo Radley and the children. This action is driven by his desire to isolate Boo Radley from the outside world.