An experiment in dressing up a plain birdhouse using materials on hand. The raw wood was covered with a Dap tile caulk/grout that comes in a red tube. This caulk happened to be a tan color that went well with the small tumbled agate rocks that were left over from a neighbor's driveway paving job. I pressed the small rocks into the caulk. It took a few days for the caulk to dry.