You will need

Cardigan
0-3mths (16in Chest) - 1 Ball
3-6mths (18in Chest) - 2 Balls
9-12mths (20in Chest) - 2 Balls
12-18mths (22in Chest) - 2 Balls

Playsuit
0-3mths (16in Chest) - 1 Ball
3-6mths (18in Chest) - 2 Balls
9-12mths (20in Chest) - 2 Balls
12-18mths (22in Chest) - 2 Balls

2.75mm and 3.25mm Knitting Needles
Stitch Holders
5 Buttons for Cardigan
9 Buttons for Playsuit