For this instructable I used store-bought fondant. First you need to sprinkle powdered sugar on your work surface. The powdered sugar will keep the fondant from sticking. Use the fondant rolling pin to work out the fondant so it is a little over 1/8" thick. The fondant will be hard in the beginning but as it warms up it will become more pliable. I roll it out until I can just see the lines on my fondant mat.
Fondant can be expensive. I also make my own fondant from marshmallows. The marshmallow fondant tastes WAY better but it takes time to create it. Many recipes for marshmallow fondant can be found on the web.