Recently I was teaching the brain lesson to a kindergarten class.  
I introduced myself as Ms. Kathy, and said that some people call
me the “Brain Lady.”  “Why do you think they call me that?”  I
always get some interesting responses, but this one takes the cake.  
A little boy sitting next to me looked up thoughtfully and stated:
“It’s the lines.”  I could not figure out what he was talking about
until the next morning.  My face looks like a brain with its lines
and wrinkles!