Materials:
Almost 90 yards of your favorite bulky yarn.
A set of 6 mm double point needles.
Cable needle if necessary.
Marker.
5 mm crochet hook (H).

Crochet notions: half double crochet (hdc), and slip stitch (sl).

How to do hdc: http://www.youtube.com/watch?v=LxA2osb5Qfk

How to do sl st: http://www.youtube.com/watch?v=BHngs7Zqr10&feature=fvsr