THE CLAY:
Does it matter what kind I buy?
Yes, it matters what *kind* you buy, but it doesn't really matter which brand-- just whichever one is easier for you to work with. Make sure it's bakeable clay and not modeling clay. It WILL melt in the oven (For example, using non-bakeable modeling clay as a filler for larger sculptures may or may not result in said sculpture cracking/exploding and oozing hot, melted slime. Not that I'd know that from first-hand experience or anything. Nonetheless, you have been warned). Some polymer clay brands are Fimo, Sculpey, Premo (I believe this is made by Sculpey), and Kato.
What's the difference bet