As Scout mentions in the opening chapter of To Kill a Mockingbird, in Maycomb,
There was no hurry, for there was nowhere to go, nothing to buy and no money to buy it with, nothing to see outside the boundaries of Maycomb County.
There was very little for the children to do but enjoy the "boundaries" of their neighborhood--the five houses that spanned from Mrs. Dubose's house to the north and the Radley Place to the south. There was no movie theatre in Maycomb, and the hot Alabama summer kept the children from spending much time indoors (where there was no air conditioning or TV). So, the children spent the daytime hours outdoors with their vivid imaginations to keep them occupied. Jem and Scout don't seem to have any other close friends, and the nearest child their own age is Cecil Jacobs, who lives at the far end of their street (and outside the boundary imposed by Atticus and Calpurnia). When Dill arrives, Jem and Scout suddenly acquire a new best friend, and their interests quickly turn to Dill's favorite subject: the Radley Place. Dill becomes infatuated with the idea of trying to make Boo "come out," and the rest of their first summers together are spent listening to Dill's wild tales, trying to make contact with Boo, and playing the "Radley Game."
The children are at first fearful of Boo, since they believe the terrible rumors they have heard about him, but when the gifts in the secret knothole begin to appear, Jem and Scout slowly come to realize that they could have only come from their unseen neighbor. They finally come to understand that Boo is trying to be neighborly in his unusual way, and that he is kind and concerned for them--mending Jem's pants and warming Scout's shoulders with a blanket on the night of Miss Maudie's house fire--and not someone to be feared after all.
Their relationship with Boo Radley is quite interesting.
They have convinced themselves that he is this scary person who stabs people with sissors, eats animals, and wanders in the night.
It's to a point in which they act out situations mocking him. They attempt to get him out of his home but do not succeed.
If you look at Boo's side, he genuinely cares for the children. He watches them from the window and makes sure they are safe from any harm. If there is any, he would come out and save them.
( When Scout and Jem got attacked in chapter 28 in the original pink copy. )
Sorry, I dont quite understand the first part of your question.