"My Brain is Shrinking"

So, my five year old can be considered a drama king.  He can be the cutest thing in the world one minute and the next can be crying and telling me that his brain is shrinking because he hasn't exercised yet today.  It all started because his dad asked him to pick up 5 things in his room before breakfast....then it all began.  He couldn't do it, he had a headache, his hands ached, and it went on and on until it culminated in the wail that his brain was shrinking.  All to avoid picking up 5 toys or items of clothing.  I just don't know where he gets it!  Of course he is the cutest thing ever as he talked about tornados and blowing snow this morning.  Ten minutes later he is crying and now, ten minutes after that he is singing Christmas carols and picking up the clothes he was asked to in first place.  This could easily drive a sane mother crazy!  What about a less than sane one like me?  Oh, I'm already there!