SIOUX FALLS, S.D. (KELO) -- Trick-or-treaters were out Thursday night. The National Retail Federation says Spider-Man, ghosts, and princesses are some of the popular costumes this Halloween. Shopping local this holiday season In Sioux Falls, at least one weatherman collected candy. Six-year-old London Beckman wants to forecast the weather someday. The Sioux Falls boy even has a collection of monitors at home, similar to the KELOLAND Storm Center. Kelli Volk: Why do you like weather?London: Because I want to teach people what's happening. Lynnette Ingalls is London's grandma. "He's a little performer, so if someone has time he will explain the different clouds. Sometimes he will say cumulus," Ingalls said. That's why his Halloween costume this year won't come as a surprise. Volk: What are you dressed as right now?London: Weatherman. London snapped a photo in his costume in front of KELOLAND News over the weekend as he trick-or-treated downtown. "Everybody was stopping and wanting to know so many questions. They were like, 'We've never seen this before. This is so unique. What a great costume,'" Ingalls said. KELOLAND News invited London back to KELO this week where he chatted with Meteorologist Scot Mundt. Mundt: What's your favorite kind of weather?London: Talking about tornadoes. Of course, no trip to KELO would be complete without a peek inside the studio. There's a lot to see in the studio, especially for a future forecaster. "What is this one?" London asked as he pointed at a computer monitor. "He's just a learning tool. He's like a sponge. He just wants to learn it all right now," Ingalls said. And the aspiring weatherman is also dressing the part.