Craft a unique birdhouse using recycled wine cork keychains. Glue the cork keychains together to form the walls of the birdhouse, leaving a small opening for the birds to enter. Attach a string or wire to hang the birdhouse in your garden or backyard. The natural insulation properties of cork help keep the birdhouse warm in winter and cool in summer. This eco-friendly birdhouse provides a cozy and sustainable home for your feathered friends.