Here are the lyrics we have:

DADDY, WHAT'S A BRAIN?

Chorus:
        Daddy, What's a brain? Is it something that is fried?
        Is it something that the heads of grown up folks might have inside?
        Is it bigger than a pea? Oh, how can I explain?
        When my little boy asks me, "Daddy, what's a brain?"

1. When I was just a boy living by the track
    Us kids'd gather up our books in a great big red book pack
    Then we'd hear the warning bell as we went into the school
    And the teacher she would smile and wave as she enforced the rules

spoken: She spoke so loud and clear
         That we opened up our ears
         And counted up as high as we could go
         They hadn't thought of self-esteem
         So I can almost hear her scream
         With a sound my little boy will never know

2. I guess that times have changed and kids are different now
    Some don't even seem to know that milk comes from a cow
    My little boy can tell the names of all the stars of rap
    I remember how we memorized the names we saw on maps

spoken: Washington and Tennessee
         South Carolina and D.C.
         Arkansas and Californi-ay
         Knowledge of the past
         And I know it's fading fast
         Every time I hear my little boy say

3. We climbed into the car and drove down into town
    Right up to the public school where knowledge should be found
    We searched the place together for something I could show
    But I knew there hadn't been a brain for a dozen years or so

spoken: The knowledge I compiled
         When I was just a child
         Warmed the cockles of my parents' heart
         And it's plain enough to see
         It meant a lot to me
        Cause my ambition was to grow up and be smart

Bev and Jerry