I used to do this to my girls' jeans after school let out. Great way to boost the summer wardrobe for next to nothing! Transform an old pair of jeans into adorable summer shorts using bias tape. Instructions on the site.
lace insert in top photo tutorial BASICALLY in a nutshell here…buy a tee…buy some lace…pin the lace to back of tee. Sew lace on the tee. Cut out fabric that is under the lace, but leave about and inch to sew back to the sides for stability.
DIY Draped Skirt…no sew. The girl in the pics is actually using an old H scarf, but any jersey fabric (roughly wide and long) will do. Just wrap, twist and tuck (and maybe add a safety pin to keep it all in place!