Walmart started a new holiday tradition last year. It starts in the summer: the company invites a test panel of 1,000 children of all ages to play with a variety of toys, then rate how fun they are. About a quarter of the toys make the chain’s annual list of the 20 hottest toys, which Walmart then stocks up on, and Walmart shoppers might pick up after their Black Friday towel-grabbing frenzy. Maybe. [More]