The red thread and some of the others look thicker than regular thread. If so they would be good for trying some decorative machine bobbin-work. Try hand winding some onto one of your machine's bobbins. Use similar colored regular sewing thread on top. Sew some samples (straight stitch, zigzag, fairly open decorative and utility stitches). You might need to loosen your bobbin tension and stabilize your fabric (heavy starch works well). I used to do a lot of bobbin work on crazy quilt seams, but there are other ways to use this decorative technique. Have fun!