Grandma, how did you know?
   I was out walking with my Grandson.
   He picked up something off of the ground and started to put it in his mouth. 
 I took the item away from him and I asked him not to do that.
 'Why' my Grandson asked. 
 "Because it's been on the ground;
 you don't know where it's been, it's dirty, and probably has germs," I replied.
   At this point, my Grandson looked at me with total admiration and asked,
 "Grandma, how do you know all this stuff?? 
 You are so smart."
   I was thinking quickly and said to him,
 "all Grandmas know stuff.  It's on the Grandma Test. 
 You have to know it, or they don't let you be a Grandma." 
 We walked along in silence for 2 or 3 minutes,
 but he was evidently pondering this new information.
 "Oh....I get it! he beamed,
 So if you don't pass the test you have to be the Grandpa".
  'Exactly,' I replied with a big smile on my face.
 Source: danggoodjokes.com 
  
  
 Other links: 
 Isaac Newton 
 Getting Late to School 
 Miserable cold 
 Taking a walk