My first raft was made as a project to be part of co oproduct. The side has lots of tutorials for making all kinds of great stuff.

http://www.co-oproduct.org/

Tackling the problem with post-consumer waste by championing the design for longerlife, reusable products and packaging.

…Imagine a world where everything that we buy is designed to last and be reused. Where landfill is a thing of the past, and waste exists only as a valued commodity for the design and production of new products…

…Imagine a world where consumer choice is based on quality, product lifespan and longevity. Where Design for Obsolescence is unheard of and the production of culture is dominated by products for reuse, repair and upgrade…

…Imagine a world where consumers can make what they need, when they need it, at home from their own post-consumer waste resources. Where everyday people come together to share ideas and knowledge and openly innovate…