You will need

Long Sleeved Cardigan
0-6mths - 2 Balls
6-12mths - 2 Balls
1-2yrs - 3 Balls
2-3yrs - 4 Balls
4-5yrs - 5 Balls
6-7yrs - 5 Balls

Short Sleeved Cardigan
0-6mths - 2 Balls
6-12mths - 2 Balls
1-2yrs - 3 Balls
2-3yrs - 4 Balls
4-5yrs - 5 Balls
6-7yrs - 5 Balls

3.25mm and 4mm Needles
2 Buttons