You will need

Jacket
0-6 mths - 2 Balls
6-12 mths - 3 Balls
1-2 years - 3 Balls
2-3 years - 4 Balls
4-5 years - 5 Balls
6-7 years - 6 Balls

Helmet
0-6 mths - 1 Ball
6-12 mths - 1 Ball
1-2 years - 2 Balls
2-3 years - 2 Balls
4-5 years - 2 Balls
6-7 years - 2 Balls

Bootees
0-6 mths - 1 Ball
6-12 mths - 1 Ball
1-2 years - 1 Ball

Blanket
5 Balls

3.25mm and 4mm Needles
Sttich Holder for Hat and Bootees
5 (5 : 5 : 6 : 6 : 6) Buttons for Jacket
1 Button for Helmet