I'd draped the ones made so far in an armchair and - light bulb moment! - you could use them to customize a cushion. A plain cream or white cushion's ideal, either shop bought or a simple homemade one. Make up the yo-yos, and sew them together, then pin the arrangement to your cushion. Once in place, sew the buttons on. Your stitches both cover the raw edges and secure your yo-yos to the cushion. Hope that makes sense, and maybe give it a try??