By Brittnee Bryant Star Correspondent Balloons, bubbles, local vendors, tasty food and music filled the air in downtown Elizabethton over the weekend. It was all part of the annual Covered Bridge Days celebration hosted by Elizabethton Parks and Recreation. The fun kicked off Friday morning and ran through Sunday evening. Vendors lined the streets downtown, selling everything from crafts and goods to tasty fudge. Downtown businesses also offered…