This type of home made bird seed feeder gives smaller birds like this mature male House Finch a more then even chance at getting sunflower seeds.

click on photo to enlarge

Materials: empty instant glass coffee jag (or peanut butter etc), metal coat hanger. Some thing to hang it on, like a Clothes line post, tree branch etc. and bird seed of your choice.

The bird in the picture is a mature male House Finch.

Suggested tools: One 10 inch locking pliers with a built in wire cutter (this is the most versatile tool I personally have and use)  and a large regular pliers.

Safety precaution: Take your time -- Sharp objects involved. Should only be constructed by responsible adults.