“It took a grocer’s offer of a cookie to finally tear 4-year-old Trey Malcom away from the small TV screen in his shopping cart. Even then, his eyes shot back to the monitor the moment he accepted the sprinkled treat from the Publix grocery store clerk. ‘He’s in his own world,’ said his mother, Amy Malcom, who was for once at peace as she filled her cart with veggies and snacks.”