Make a wind chime out of old keys and acrylic paint. - This site has lots of cheap outdoor/backyard ideas. I can't use most because I live in an apartment - but I love the old key to windchime and spray painted folding chairs.
Side Mounted Birdhouse Plans With Side Entrance Hole Free Birdhouse Plans - 1 side entrance hole accommodates chickadees, wrens, nuthatch, & Downy woodpeckers. This site includes plans for others, too.