Build a Birdhouse
When building birdhouses, one size definitely does NOT fit all. Know which birds are common to your area and find plans for a house that will suit the birds you wish to attract to your yard.
Paints, varnishes, and polyurethane come in various types; each leaves a different finished look. Matte finish dries somewhat dull, semi-gloss (also called a satin finish) is slightly shiny, and gloss finish is very shiny.