also try del-mart or bobstackle. They are made from aluminum. Cost more but will last forever. If you just want to try it I would start with a PoP mold. Made from Plaster-of-Paris. Get a bag at Lowes or Home Depot for about 5-10 dollars and can make 20-30 molds. I have a few PoP molds and they do good for personel use. But if you plan to sell any go with a good aluminum mold. The detail comes out more with them.