This scene comes immediately after the loading up scene. The kids are all geared up and as soon as they finish, their trusty dog jumps up and around Sarah and tries to get her attention. David notices Blackie is nudging for the walkie talkie right after he was looking out the window-which has a view to Joe’s house. Joe is their neighbor and friend who was shown in an earlier scene. They usually communicate via walkie talkies. They then get an idea that there is trouble at Joe’s house, they try to establish contact.
David is seen here taking out a pair of binoculars-which then continues to the Binoculars scene here.