SIOUX FALLS, S.D. (KELO) -- Here are some Sunday events to bust your boredom: It is the opening weekend of the Back Forty Beef Adventure farm near Pierpont. Enjoy an America 250-themed corn maze, a giant slide, a farming-throughout-the-seasons maze game and a whole lot more. The hours Sunday are fro m 5 p.m. until 9 [...] ...read more read less