Wash cloths are great for infant bibs. Adding a cute design by free hand machine embroidery is a quick and inexpensive upgrade. Vintage sewing machines that have a stretch straight stitch are perfect for sewing a cute design on the bib that does not interfere with absorbency of the bib.
The bias tape is easier and turns out smoother if you open it up and sew on the edge. Then fold it over and sew it closed. It takes 30 seconds longer, maybe a minute, but the finish is much smoother.
Hm, well I don't know much about cerebral palsy myself. What kinds of things would be good for that? Are you thinking of a bigger bib to catch larger messes at meals? Something smaller and stylish to catch drool throughout the day? Is there a specific type of closure that would be better than others, such as Velcro, snaps, or buttons? Or maybe just elastic that goes over the head?
Mariette Forget I think the biggest thing is to go slow so you can keep it in control. I also usually pull the curved edge of the fabric out into a straight line (like what I do at about 4:40 when showing the pinning job in the video) so that I am not actually sewing on a curve. When doing that, you just have to be careful to keep the edge flat and not let the fabric pucker up under the bias tape.