WINTER HAVEN, Fla. — Halloween season has settled in at Legoland Florida. Its Brick-or-Treat event, much like the theme park itself, is geared to the 2-to-12-year-old crowd, but there’s ample lighthearted spooky stuff to entertain the adult crowd, too, including shows, Lego group builds, specialty foods and distinctive character interactions. There’s an emphasis on Lego’s monster characters this year, a new chapter. if you will. of Brick-or-Treat, said Kelly Hornick, head of Legoland Florida marketing and communications. “The Lego monsters have really taken over. So, we have the Lego Plant Mon…