They are excited because they have found a way to make contact with Boo Radley. Boo Radley is a legend in the community, most people are unsure of whether he is dead or alive but Scout and Jem have found a way to communicate with him.
According to Jem, Boo Radley was responsible for putting the cement in the tree hole and stopping the delivery of gifts to Jem and Scout. Jem believes Boo did this to prevent them from further connecting with him and to protect them from potential harm.
they where attacked by mr ewell down by the oak tree
Boo Radley was the one who was leaving gifts for Jem and Scout in the knot hole of the oak tree.
Nathan Radley, Boo Radley's brother filled the knothole with cement. When Jem and Scout asked him why he was doing this he told them that his tree was dying and filling the knothole with cement would keep it from dying. Scout and Jem went and asked Atticus if he thought the tree looked like it was dying and he said it looked perfectly healthy.
Scout and Jem find two pieces of chewing gum, a ball of twine, and two Indian-head pennies in the knot hole of the tree. What frightens Scout is finding the gum and the twine, as they suspect someone has been leaving items for them in the tree, suggesting a hidden observer.
In "To Kill a Mockingbird," it's implied that Boo Radley was the one leaving little gifts, including the candy, in the knothole of the tree for Scout and Jem. It was his way of reaching out and trying to connect with the children, despite being reclusive.
Jem told Scout to put a blanket out on the back porch so they could have a picnic while watching the trial of Tom Robinson.
Angle may A more detailed answer. Jem calls Scout names such as "Miss Priss, Angel May, and girl because he knows that Scout is a "tom boy" and doesn't fit in with what was considered a lady. Scout wants to belong with the boys and feels that she is just as capable as any boy. The names Jem uses are not to show his affection. He uses them purposefully to make Scout feel bad so that she would stop complaining about some antic he and Dill had schemed up. In chapter 5 when the Jem and Dill plan to put a note on Boo Radley's porch, Scout voices her worries. Jem counters by telling her "Now you're in it and you can't get out of it, you'll just stay in it, Miss Priss!" (Lee). In chapter 6, Jem and Dill plan to sneak into the Radley backyard so they can get a glimpse of Boo. This time, Jem uses the name "Angel May" to antagonize Scout. When she tries to talk Jem out of his plan, Jem tells her that she's "getting' more like a girl every day!" (Lee).
boo radley
The tree in "To Kill a Mockingbird" has knots from an old Negroes were hanged where Boo Radley put gifts for Scout and Jem. This sickness may symbolize the dark history and prejudice that the town holds.
Jem realizes that Boo Radley must have been the one to cover Scout with the blanket during the fire, showing that he had been looking out for them all along. This revelation deepens Jem's understanding of Boo's kindness and concern for their well-being.
He leaves "gifts" for them in the hole of the tree they pass by on the way to school. He sews Jem's pants for him the night they sneak out to his house. Scout hears laughter from inside the Radley house when the tire she is in bumps into the house.