Sewing the Sébastien Underwear set sewing pattern for boys

You can find the sewing pattern here: https://ikatee.com/products/sebastien-underwear-set-swimsuit-boy-3-12y-pdf-sewing-pattern I. INTRODUCTION 00:00 A. Design and skill level II. SUPPLIES AND TECHNIQUES SPECIFIC TO UNDERWEAR AND SWIMSUIT 02:50 A. Fabrics 06:22 B. Elastics 07:25 C. Sewing machine settings III. SWIMSUIT 09:03 A. Assemble outer swimsuit and lining 10:36 B. Assemble lining and elasticated belt 13:33 C. Finishes IV. TANKTOP 14:08 A. Assemble shoulders and side seams 14:52 B. Assemble ribbing at neckline and armholes 19:05 C. Hem V. BOXERSHORTS 20:42 A. Sew the dart 21:26 B. Assemble gusset with enclosed seams 23:52 C. Assemble front, back and leg inseams 24:45 D. Sew elastic 26:51 E. Hems