Some good plans for building a wooden coffin include plans for a rectangular casket, or a "toe-pincher" coffin, like the ones in old Western movies. Simple pine casket kits are available for those wanting to build a casket but don't have the skills to do so from scratch.
A rectangular casket has six sides, including four side walls, a top and bottom, while a coffin has eight sides, which include six side walls, a top and a bottom. Both projects require the use of wood, thread rope for handles, a drill and a table saw to cut the wood into appropriate sizes and shapes. Plans for both the rectangular casket and toe-pincher coffin projects are available at NorthwoodsCasket.com.