Because the kids are to young to understand the situation that is happening but it is mostly because of the cussing by the Ewellls. =)
(Your Welcome)
Dill and Reverend Sykes
The black Reverend and Dill are with Scout and Jem. They all sit in the first row of the balcony. When Atticus leaves the courtroom, the Reverend insists that Jem and Scout stand in respect for their father.
The children, Scout and Jem, go to the courthouse to watch Tom Robinson's trial. They are accompanied by Reverend Sykes, their housekeeper Calpurnia, and other members of the African American community.
Do you go to my school? We have to answer the same question for tonight's homework... Anyway, I looked it up and the answer is that they sit up in "The Colored balcony" with Reverend Sykes.
Among Black citizens, Atticus has become a hero. They give up their seats as a sign of respect for the children's father. It is the Reverend who has to nudge the children to stand when Atticus leaves the courtroom. They had not yet learned their father was so deeply respected in town.
The children, Scout and Jem, watch Tom Robinson's trial from the colored balcony in the courthouse, sitting with Reverend Sykes. They are able to get in thanks to the kindness of the Reverend, who saves seats for them.
Reverend Sykes takes Jem, Scout, and Dill to the black church, First Purchase African M.E. Church, in "To Kill a Mockingbird" by Harper Lee.
Reverend Sykes secures seats for Jem, Scout, and Dill in the "colored balcony" of the courthouse so they can see and hear Tom Robinson's trial. He provides them with insight and guidance throughout the trial, helping them understand the events and the injustices taking place in Maycomb.
Scout gives Dill a drink of water during Tom Robinson's trial to help soothe his nerves. Dill becomes overwhelmed by the tense environment of the courtroom and Scout's act of kindness calms him down.
Scout, Dill, and Jem sit in the "colored balcony" during the trial, as there is no room for them on the main floor of the courthouse. They watch the proceedings from this segregated section reserved for African Americans.
Scout, Jem, and Dill live with Aunt Alexandra, Atticus, and Calpurnia during the trial.
Reverend Sykes was the leader of the black congregation in Macomb, Alabama. During the trial of Tom Robinson, blacks were allowed to observe, but only from the balcony. Atticus Finch's children, Jem and Scout, were forbidden by their father from attending trials. Nevertheless, Jem led Scout and their friend Dill (based on the true life Truman Capote) to town to see the trial. The main floor was so crowded the children couldn't get in. Up in the balcony, Reverend Sykes cleared space for the three children in the front row. They watched the trial, with Jem claiming Scout could not understand the details of the rape trial. Scout demurred. Despite a valiant and thoroughly unappreciated effort (by his most of his white peers), the jury came back with a verdict of guilty; Jem hung his head. The white crowd on the ground floor slowly cleared out until only Atticus Finch was left, first bucking up Tom for the appeal, then checking with the court reporter to make sure the transcript would be ready for appeal. At last, he put his papers in his briefcase and walked down the main aisle toward the exit. Unbeknownst to him, the entire black audience in the balcony had remained. As he passed beneath them, they all silently rose in tribute. Scout had fallen asleep, leading to one of the greatest lines in all cinema, as Reverend Sykes whispers to her, "Jean Louise, stand up. Your father's passing."