http://dornob.com/diy-stone-bathmat-creating-a-luxurious-shower-experience/
Excerpt:
“Susan Wasinger from Natural Home (via LifeHacker) spells out the simple steps and materials, but essentially: (1) make the frame, (2) add a wire mesh screen, (3) add the stones. And voila, a free foot massage every day. The tools are elementary as well: a basic saw, pliers, screws and glue will do.”