FROM LEFT TO RIGHT, FIRST GIRL Shirt £45 by Baby Graziella (ages 1–12); cable-knit tank top from a selection at The Theatre and Film Costume Workshop; tartan skirt £64 by Gant (ages 3–13); socks stylist’s own. FIRST BOY Aran sweater from £50 by DKNY (ages 2–16); jacket from £140 ...