Here’s an interesting contest: recycle discarded mattresses into useful products! Deadline has been extended to December 19:

The competition aims to encourage entrants to form groups capable of creating a consumer product, instructions detailing how to make the product, and a plan for production on a larger scale. Entrants must create designs that take into account the volume of mattress waste generated each year. Groups are encouraged to utilize local resources, including existing manufacturing facilities and other waste products.

Via Core77.