Jem and Dill looked into the Radley window because they were curious about Boo Radley, they wanted to catch a glimpse of him, they were trying to get a reaction out of him, and they were looking for a thrill or excitement.
Jem and Dill are curious about what Boo Radley looks like because they have heard spooky rumors about him. They want to catch a glimpse of him as a thrill-seeking adventure, and also to satisfy their curiosity about the mysterious neighbor.
The children decide to spend Dill's last night in Maycomb by trying to see Boo Radley. They sneak into the Radley yard, trying to catch a glimpse of Boo through the window. However, they get caught by Atticus and their neighbor, Miss Maudie.
From the book: "Why do you reckon Boo Radley's never run off?" Dill sighed a long ligh and turned away from me. "Maybe he doesn't have anywhere to run off to..." Scout: "Why do you reckon Boo Radley never ran off?" Dill: "Maybe he doesn't have anywhere to run off to..."
Go to Boo Radley's house and Dill "proposes" to Scout. They plan to get married when they're older and live in Maycomb, Alabama.
basicaly
Dill's idea is too mess with Boo Radley. He wants to get him to come out of the house. They come up with all kinds of wacky ideas like putting a note on a fishing pole and trying to stick it through the Radley's window to try to get Boo Radley to come out and they also snuck up on his front porch in an effort to try to see if he was in the house and they nearly got shot my Mr. Radley with his shotgun. he is determined to try to get him to come out of his house.
DILL
Dill, Jem and Scout act out Boo Radley's childhood.
Miss Stephanie Crawford wants Dill to stay away from the Radley house because she believes the stories and rumors about the Radley family are scary and potentially dangerous. She thinks it's best for Dill to avoid getting involved with anything related to the mysterious Radley family.
Jem and Dill get the idea to write a note to Boo Radley asking him to come outside and tell them what he does inside his house. Furthermore, they write that they will buy him an ice cream and will not hurt him. They put the note on the end of a fishing pole and try to attach it to a window shutter on the side of Boo's house.
Dill, Scout, and Jem frequently like to play the "Boo Radley" game, where they reenact stories and legends about their reclusive neighbor, Boo Radley.
Dill said, "We're askin' him real politely to come out sometimes , and tell us what he does in there - we said we wouldn't hurt him and we'd buy him an ice cream." This can be found on page 62.