Dean holds Sammy's hand tight as they walk through the big double doors into the old brick school building. He remembers his first day of school like it was yesterday. Remembers the fear of being away from his family that had made that day last forever.
Sammy's not scared. He's looking around and smiling and talking a mile a minute. Where's my room, Dean? Who will be my teacher? Do they really have lots of books?
When they get to the kindergarten Dean scans the room, though he knows Dad's already checked it. Sammy won't go in unless it's safe.