Did you love to make mud pies when you were a kid? Even if you didn't, you can still build this easy outdoor oven that works as well as a custom-built masonry or ceramic model. Cost? Next to nothing. Material? The earth under your feet — one of the best building materials on the planet. And the skills you need are just the ones you were born with. Come to this workshop and you'll enjoy crusty, chewy and richly flavored bread, pizza and other baked goodies in no time. Cost for the day - $60.