You will need

Jacket
3-6mths (16in Chest) - 1 Ball
6-9mths (18in Chest) - 1 Ball
9-12mths (20in Chest) - 1 Ball
12-18mths (22in Chest) - 2 Balls

Sweater
3-6mths (16in Chest) - 1 Ball of Shade B
6-9mths (18in Chest) - 1 Ball of Shade B
9-12mths (20in Chest) - 1 Ball of Shade B
12-18mths (22in Chest) - 2 Balls of Shade B
(Small Amount of Shade A for all sizes)

Hat
3-6mths (16in Chest) - 1 Ball of Main Shade
6-9mths (18in Chest) - 1 Ball of Main Shade
9-12mths (20in Chest) - 1 Ball of Main Shade
12-18mths (22in Chest) - 1 Ball of Main Shade
(Small Amount of Contrast Colout for all sizes)

Mittens
Small Amounts of Shade A and B for all sizes

Blanket
2 Balls of Shade A
2 Balls of Shade B
2 Balls of Shade C

3.75mm and 4mm Knitting Needles
3 Buttons for Jacket
2 Buttons for Sweater