Materials
DK wool (I used Wool craft) in 3 contrasting colours (roughly 60g per colour)
5mm crochet hook
3.5mm crochet hook

US Terminology.

CH: Chain
SS: Slip stitch
SC: Single Crochet
HDC: Half double crochet
DC: Double crochet
TC: Treble crochet
BPDC: Back post dc

Guage:
14 dc and 9 rows of dc = 10cm

Size: ages 3-5

Finished garment measures:
32cm across chest (64 around)
29 cm length
24cm sleeve length
63cm wrist to wrist