Building up an immunity ... to the cold!

If you've seen the national weather forecast recently, you would have heard that it's been bitterly cold in New England this week.  

Absolutely unbelievable is the sight of my son, leaving the school building, with his winter coat slung across his shoulder ... and only a sweatshirt to keep warm.   The parents (myself included) waiting for our children are reminiscent of multi-color penguins ... standing stationary head into the wind, with eye lashes frozen to faces.  But the kids appear oblivious and simply do not feel the cold!  Amazing!