You will need

Crossover Cardigan
Prem (12in Chest) - 1 Ball
0-3 mths (14in Chest) - 1 Ball
3-6 mths (16in Chest) - 1 Ball
6-9 mths (18in Chest) - 1 Ball
9-12 mths (20in Chest) - 2 Balls

Long Sleeved Cardigan
Prem (12in Chest) - 1 Ball
0-3 mths (14in Chest) - 1 Ball
3-6 mths (16in Chest) - 1 Ball
6-9 mths (18in Chest) - 1 Ball
9-12 mths (20in Chest) - 2 Balls

Sweater
Prem (12in Chest) - 1 Ball
0-3 mths (14in Chest) - 1 Ball
3-6 mths (16in Chest) - 1 Ball
6-9 mths (18in Chest) - 1 Ball
9-12 mths (20in Chest) - 2 Balls

Cap Sleeved Cardigan
Prem (12in Chest) - 1 Ball
0-3 mths (14in Chest) - 1 Ball
3-6 mths (16in Chest) - 1 Ball
6-9 mths (18in Chest) - 1 Ball
9-12 mths (20in Chest) - 1 Ball

3.25mm and 4mm Needles
2 Buttons for Crossover Cardigan
4 ( 5 : 5 : 5 : 5) Buttons for Round Neck Cardigan
2 Buttons for Sweater