Oskar realizes he hasn’t shown Abby the key. He reaches to the key hanging under his shirt and places it in Abby’s hand, so that they’re close. He invites her to his school production of Hamlet. Oskar asks if they can kiss. Abby refuses. Oskar says that humans are the only animals that have religion, wage war, and kiss, so the more someone kisses, the more human they are. Abby asks what that means about someone who wages war. 

Oskar then goes to his grandma’s house. Grandma looks like she’s been crying, which is odd because she says she cried all her tears when grandpa left. She explains she’s been talking with the renter. 

Grandma stayed with Oskar after his dad died. While walking around the park, Oskar hides because he wants someone to look for him. He watches Grandma panic. When she approaches his apartment, Oskar jumps out and surprises her. Grandma returns to her apartment and puts a sign in the window that Oskar can read with his binoculars. It says, “Don’t go away.” Now whenever they go for walks, Oskar responds that he’s okay whenever Grandma says his name.

After his dad died, Oskar went with his mom to a storage facility full of his dad’s things. When Oskar finds baby monitors, he asks why his dad saved them. His mom responds that they’re for Oskar’s future kids. Oskar becomes angry that a lot of the things in storage are for his hypothetical children. He uses the baby monitors to talk with Grandma across the street.

When Oskar developed an interest in stamps, Grandma bought him a sheet of stamps featuring great American inventors. She identifies the inventors for him, including the inventor of the atomic bomb. Oskar exclaims that the man wasn’t a great inventor. Grandma explains that he was great but not good. 

Grandma asks Oskar what he did all day. Oskar recognizes that at this moment he could have told Grandma about the key, but instead he lies. He hears footsteps and asks Grandma if it’s the renter. Grandma insists there’s nobody else in the apartment.