I started out today by sewing the back and crotch seams with the serger, I also re-enforced them )only on the main fabric) with the stretch stitch.
Then I sewed on the upper back and rest of the elastic.
After finishing all the edges with the double needle I sewed on the hook and made the loop.
All that is left to do is to sew the straps on the back, but I am waiting until the kids get home from school to make sure the strap length is correct.
Edit, it’s finished!
We both love how it turned out. And yes she is pretending to swim laying on her beach towel.