Just thought of this, and I don't even know that it would work, but you could string several spools on a piece of thin rope. Spread peanut butter on the middle parts of the spools and roll in bird seed. Hang from a tree and make some birds happy. They'll be able to land and hang on to the bases of the spools. I suppose you could glue some small dowels to the bases so they had a better perch though.