Shawl collared cardigan requires the following balls of 50g

6-12 months = 3
1-2 years = 4
2-3 years = 5
4-5 years = 6
6-7 years = 7

V neck cardigan requires
6-12 months = 2 MC, 1C
1-2 years = 3 MC, 1 C
2-3 years = 4 MC, 1 C
4-5 years = 4 MC, 1C
6-7 years = 5 MC, 1C