Looks complicated but straightforward once you begin, just knit with the colour in use and slip the stitches in contrast. More hints included in pattern.

Sizes: ages 6 months (12 months) approximately. Actual chest measurement of jacket 52(56) cm.
Materials: Cotton 4-ply: 2(3) x 100g balls 267 m/295 yds each in A and B; pair 3 mm and 3½ mm needles US 2 and 3; 5 small buttons for jacket; stitch holders.