Here is my basic to guide to creating crocheted stuffies. In this guice I will aim to teach you how the create the magic ring (magic loop, amigurumi ring etc.) and go on to tell you how to crochet a stuffed ball.
To begin you will need only three things;
Yarn - you can use any yarn you want, for this I'm using robins DK
A crochet hook - For this I'm using a 4.5mm (US G/H) though I would normally use 3.5 mm or 2.5mm (US C or E)
Stuffing - I'm using a synthetic fiber to stuff you could use anything fluffy really, though polyfil gets the job done and is cheap too :)
First off you'll want to learn how to create the magic ring (there is other ways to start but as I said this is my guide :P)