Here is an original idea to design a seat from a single board of plywood and plastic ties.
The Zipstich chair was designed by Ben Uyeda for the 19th episode of HomeMade Modern.
More difficult to manufacture than a bench or a stool, this chair is however realized in a simple way. Original.
Here is the video of the designer:
) (source: http://pinterest.com/pin/5207355792261059/ )