Penny for your Thoughts

As Ellen was sitting silently in the back seat, I asked her ......  "what are you thinking about"?   "Nothing'', she replied.  I said - "you have to be thinking about something".  " No Dad - nothing".  What happens when our mind just wanders - our subconscious mind just takes over? 

I'm reading a good book about the brain - "The Scientific American Day in the Life of Your Brain" - A 24 hour journey of what's happening in your brain as you Sleep, Dream, Wake Up, Eat, Work, Play, Fight, Love, Worry, Compete, Hope, Make Important Decisions, Age and Change - by Judith Horstman.

  More to come .......  Insert a penny for further thoughts - part 2.