Difficulty: Intermediate. I tried to be as detailed as possible in my descriptions. I also included some graphics to make the explanations easier to understand.

Required skills: Crocheting in spiral, crocheting in rounds, chain, slipstitch, single and double crochet stitch, increasing and decreasing.

Some of the materials you will need:
2,25 mm crochet hook (US size 1/B - 2/C) or according to the yarn.
Soft stuffing (Polyester, wadding, polyfiber fill, etc.)
12-14 mm security eyes (doll)
Tapestry needle, stitch marker, scissors and pen
Wire or pipe cleaner to make the frame of the glasses