Lately, there has been a lot of news about how traditional Christmas cards are going by the wayside due to the convenience and affordability of sending them to your address book via email or even Facebook.. We tried to send Christmas cards once, when our kids were wee tots and it just added to the holiday stress, so I’m not a big advocate of sending Christmas cards in general. Of course, we love receiving them and I respond to everyone but just cannot take it on myself. Because I appreciate them, I was interested in this Holidays on Display exhibit at the National Museum of American History. It documents the…