Garrett Kling, an 18-year-old senior at Watertown-Mayer High School, was the grand-prize winner at the third annual Watertown Film Festival for his short film "Home School Musical," described as a love-at-first-sight story about Bernard and Beatrice. Kling received the $200 prize at the Feb. 27 festival, which drew a crowd of more than 300 people to the new performing arts center at Watertown-Mayer High. The movie is on YouTube in two parts.