Set the alarm, get the kids in their costumes and head downtown for the last Downtown Farmers Market of the 2013 season. From 8 a.m. to noon, children are invited to dress up in their Halloween costumes for trick-or-treating with the market vendors. Adults and vendors are also encouraged to dress up. Although Saturday is the last Downtown Farmers Market of the regular season, the Downtown Winter Farmers Market will return Nov. 22-23 and Dec. 13-14 at Capital Square and Kaleidoscope Mall, located at 555 Walnut St. in downtown Des Moines.  Visit www.desmoinesfarmersmarket.com for more information.