Welcome to the December 10, 2011 edition of Traveler’s Show & Tell This week’s Traveler’s Show & Tell blog carnival is chock full of interesting travelogues and lots of pretty pictures from bloggers all over the world. Read on for: …tips for traveling with children during the holidays . …how Argentina elevates graffitti to an art form. …photos of interesting street signs from around the world. …the best cities to visit for a Christmas holiday in the UK. …and more! Christine presents Open Market in Granada, Nicaragua posted at Me, My Kid and Life, saying, “Having been to open markets…