An interesting 'accordion' dress concept I saw on a Chinese dress site people might be interested in (link to dress in comments) : sewing. It would be interesting to not too a bunch of colors for the accordion part, but just one.
Combined A-shape thick cotton dress with figured velvet inserts. Band collar and cap sleeves with lace trim. Hidden zip closure and decorative back bow. On the photo: model is wearing a size S and is 170 cm.