These are so easy it is almost embarrassing! I found this fabric with one edge already shirred with elastic and hemmed. Just buy enough to stretch around the body. I sewed straps but you could also use ribbon. Simply sew the one side seam and attach the straps. Hem the bottom edge at the right length or just use the selvidge! And Voila! Mom is a hero- my daughter is thrilled with these 2 I made for her. Sewing doesn't have to be complicated.