01
What this one is
You know that dress you pull out for the one photo everyone will ask to see later, the christening, the first birthday, the visit from grandparents who live too far away. This is that dress. Navy and white always reads dressed-up without trying, and on a 12 to 18 month size it turns a baby into someone with real presence, flutter sleeves and all.
Your hands spend most of the time in plain single crochet rows, building the back and front bodice panels flat before any shaping starts. Then you slow down for the neckline's picot ruffle, the eyelet waistband, and the pom poms at the end. Between the two panels, the edgings, and the skirt, plan on a few sittings rather than one long stretch.
02
Try it another way
The stripe pattern here is really just a placement choice, so you can swap which panels get Yarn A and which get Yarn B, or make the whole bodice navy and save the white for just the neckline picot trim and pom poms. If you want a different color story altogether, the pattern already calls for a worsted cotton or cotton blend, so any two contrasting shades in Lily Sugar'n Cream, 24/7 Cotton, or Paintbox Yarns Simply DK held double will behave the same way. The eyelet waistband row is built for a ribbon or a crocheted chain drawstring, so thread through whichever cord matches your color scheme, or skip the tie entirely and let the eyelets sit as a decorative row. For the flutter sleeves, working both to match is the written plan, but there is nothing stopping you from making one a touch fuller by adding a round if you want more movement. And since finished chest circumference sits at approximately 20 inches for the 12 to 18 month size, keep an eye on your gauge swatch if you are hoping to size the dress up or down from there, since the whole bodice count of 46 sc depends on holding that 18 sc by 20 rows tension.
There is real satisfaction in a project that teaches you to read your own rows without hand-holding, and this dress does exactly that. You start with straightforward single crochet panels, then the pattern asks you to shape both underarms with sl st and sc2tog decreases on the same rows, so you watch the bodice narrow stitch by stitch under your hook. The neckline's picot ruffle is the reward section, three single crochets and a chained picot repeated around the whole opening, worked in the contrast navy. Add an eyelet waistband row for a drawstring or ribbon later, plus a chevron-stitch skirt and hand-tied pom poms, and you get a piece where every part uses a different skill instead of repeating the last one.