You must have knowledge of basic crochet stitches (single and double) as well as how to do a magic circle (popular with amagurumi and a very easy technique, directions can be found with a quick internet search).

Materials needed:
Yellow/Black/Brown/Red/White yarn
Crochet hook, size 5.5-6.5
Yarn needle

I used Lion Brand Homespun for this project, however it will work with any medium to bulky weight yarn. Homespun is hard to work with, I do not recommend it for beginners.