Begin by thoroughly cleaning out the inside of the paint can with dish soap and water. Remove the can's label, and let the entire thing soak overnight in hot water.
After it's dry, use hot glue to attach the wooden dowel or stick perpendicular to the front of the feeder, which will serve as a perch for feeding birds.
To hang the bird feeder, wrap the exterior in decorative ribbon (you could also use a chain, fishing line, or twine) and secure it with a dab of hot glue.
Hang the feeder from a tree branch or patio and fill it with birdseed. You could also customize your bird feeder by painting it, adding a wooden roof, or decorating it.