You will need

Cardigan
0-3 mths - 1 x 100gm Balls of three contrasting colours
3-6 mths - 1 x 100gm Balls of three contrasting colours
6-12 mths - 1 x 100gm Balls of three contrasting colours
1-2 yrs - 1 x 100gm Balls of three contrasting colours
3 -4 yrs - 1 x 100gm Balls of three contrasting colours

Hat
1x 100gm Balls of three contrasting colours for all sizes

3.25mm and 4mm Needles
Stitch Holder
3 (3 : 4 : 4 : 5) Buttons
4 x 4mm Double Pointed Needles for Hat