With a 1-1/2 in. entry hole size, this outdoor bluebird house has a properly sized entrance that helps attract ideal bird species like bluebirds, wrens, tree swallows, and chickadees to the house, while also keeping out predators and unwanted occupants such as European starlings. The birdhouse kit for kids and adults is made of untreated, unpainted cedar wood; the rough surface of the bluebird nesting box provides birds with footholds to enter and exit the cedar bluebird house, and the cedar wood also protects the outdoor birdhouse from weather damage. This bluebird house serves as a safe home for fledglings: it features a copper predator guard around the entry hole to help young birds fend off predators, and the interior of the outdoor birdhouse has grooves that act like small ladders, assisting fledglings (especially swallows and bluebirds) in leaving the cedar birdhouse to go outdoors, making it perfect for outdoor spaces to easily create a habitat. Assembly is simple and fun-all you need is a screwdriver to enjoy building the bluebird house with your family, and feel the pride of creating a nesting box for birds; you can also DIY and paint it to make the bluebird box unique and create your own outdoor bluebird house. It is easy to clean and reusable: the front door of the wooden birdhouse can be easily opened after fledglings leave for convenient cleaning; after the birdhouse season ends, clean the bluebird box, store it outdoors. Color: Natural Wood Color.