Meet Elly Kulesza, Terror Toddler. In her finer moments—mainly when she’s on land — 3-year-old Elly is an adorable and sweet-mannered child, a blue-eyed charmer who likes to dance and harbors a particular fondness for Thomas the Tank Engine. “She’s a typical 3-year-old,” said her mother, Julie Kulesza of 7 Primrose St. in Worcester. “She has her moments like all 3-year-olds, but she’s not like one of those ‘Nanny 911’ children you see on TV.” Elly’s dad, Gerald Kulesza, is a full-time EMT in Boston who also attends nursing school full time, and he did so well last semester that...