You will need

V Necked Cardigan
0-6 mths - 2 balls
6-12 mths - 3 balls
12-18 moths - 3 balls
18-24 mths - 4 balls

Collared Cardigan
0-6 mths - 2 balls
6-12 mths - 3 balls
12-18 moths - 3 balls
18-24 mths - 4 balls

Sweater
0-6 mths - 2 balls
6-12 mths - 3 balls
12-18 moths - 3 balls
18-24 mths - 4 balls

3.25mm and 4mm Needles
Cable Needle
Sttich Holders
4 Buttons for V Necked Cardigan
7 Buttons for Collard Cardigan
6 Buttons for Sweater