You can create a simple platform feeder by going to a local lumber or other home depot supply store. There you can pick up a half inch piece of plywood. Out of the plywood create four equal sides to attach to the bottom, or platform of your feeder. 3/4 inch galvanized screws will work fine, so they do not rust in the weather. Take a piece of 1/4 inch or smaller mesh screen, or similar screening and staple it to the bottom of the feeder. Then you can either suspend it with wire from a tree branch. Voila there is your simple platform feeder which you can add a variety of seeds to, including black-oil and grey striped sunflower seeds. You can then sit back relax and watch a variety of colorful birds come to your new homemade feeder.