These days, you’ll find Sever’s Fall Festival on a 100-acre campus east of Highway 169, south of Shakopee — but it all started in Eden Prairie. Sever Peterson III, a resident of Eden Prairie, and his wife, Sharon, still live on the farm in the Minnesota River valley where both Sever and his father were born. In the mid-1990s, as they faced a struggling economy for their corn and soybean crops, “We were thinking, ‘What else could we do to keep our family involved in agriculture?’” Sever said. The idea for a corn maze arose after the Petersons visited an…