Quote from Pops in The Day After the Day After
Barry: What are we gonna do? I got kicked out of Dad's pretend bunker, which I pretended first. Pops: That's it. We'll build our own bunker in the basement. Barry: Dad will never allow that. Pops: Then, you just gotta convince him. Barry: To the chalkboard! Pops: To the chalkboard! Barry: Oh, it's here. Pops: There it is.