Learn the skills involved in Earthbag building with Neil Decker of Cal-Earth (The California Institute of Earth Art and Architecture)! Earthbag building is rapidly gaining in popularity as people discover the benefits. It's one of the simplest, lowest cost building systems in the world. The list of advantages goes on and on. You can save money, do less harm to the environment and have a more durable structure - come along to the workshop and learn these great skills - Cost $60.