Kevin White, left, Keith Rozier and Jake Jacobson all of Malone Design Fabrication of Atlanta, Ga., build a HunterÕs Cabin, one of the new exhibits, at the Muscatine County Environmental Learning Center in Discovery Park. The crew will be installing exhibits representing IowaÕs Changing Landscape. The date for the grand opening for the Learning Center will announced in the coming weeks. The Learning Center is open to the public while installation of the new exhibits continues.