Materials needed:

DK (3 or light) weight yarn of different colours. The exact weight of the yarn is 100g - 260m / 3,53Oz - 274 yds.
2 mm crochet hook
6 mm safety eyes
Black yarn for embroidering
Fiberfill for stuffing
Sewing needle and scissors
Safety pins (to make assembling easier)
Stitch marker (to mark the first stitch on the round)

Abbreviations:

st = stitch
sc = single crochet
ch = chain
inc = increase (2 single crochets in one stitch)
dec = invisible decrease (2 stitches together
working in front loops only)
sl = slip stitch
hdc = half double crochet
dc = double crochet
BLO = back loops only
(..) = repeat between () number of times
indicated