Santa Claus kicked off the Christmas shopping season in grand style last week in St. Louis, where he was escorted by 3,000 children to his castle at the sprawling 200-store Northwest Plaza. In New York City, Macy's staged its lavish Thanksgiving Day parade, towing Bart Simpson and 12 other giant balloons to Herald Square, where a 36-ft.-tall Paddington Bear now hovers invitingly above the entrance of the flagship store. In San Francisco holiday shoppers were making a beeline for the free merry-go-round and other rides on the roof of the Emporium. Across America, retailers are trying all sorts of stunts to...

