The simplest decoration which can be seen at every holiday is a garland. It won’t take you much and looks original. For a simple garland for 4th of July you’ll need red, white and blue felt, a thread and a ribbon. First cut out a bunch of stars. It would be more original to do larger for the red and blue ones, for example and smaller for white ones, or in another combination. Now take a cute ribbon on the end and sew it to the tip of your first star, then just make a stitch in each next star to keep them together.