Jelly roll rugs are a popular sewing project. It's not hard, but it does take some time to make them. I put on some shows and sewed away for two afternoons!
Pick a jelly roll with fabrics that suit your style, get some 2-1/2" batting rolls (or cut batting into about 50 yards of 2-1/2" strips), and LOTS of thread. Prepare about 7-8 bobbins ahead of time.