T-bag hat (bottom left) and pull on hat (top left): 0-3yrs 1 ball, 4-7yrs 2 balls.
Cable bonnet (bottom right), 0-2yrs only: 1 ball.
Striped hat with ear flaps (top right) all sizes, 1 ball in each of 3 colours. Based on 50g balls Sirdar Snuggly DK. 22st/ 28 rows to 10cm, 4mm needles.
Other suggested yarns Sirdar Snuggly Kisses DK, Baby Crofter DK and Baby Bamboo - quantity may vary. 3.25 and 4mm needles. Cable needle for pull on hat and bonnet. 1 button and optional 3.25mm circular for bonnet. St holders for hat with earflaps.