Kim Beaton sculpted this fantastic tree troll. She's started a company called Pal Tiya which makes a clay (also called Pal Tiya) that can be used to make such sculptures permanent, and weather-resistant. They're starting to take pre-orders for shipping to the U.S. (their company is based in New Zealand).
http://www.paltiya.com/store1.html
http://www.odditycentral.com/art/artist-creates-amazing-tree-troll-inspired-by-her-father.html
http://www.paltiya.com/store1.html
http://www.odditycentral.com/art/artist-creates-amazing-tree-troll-inspired-by-her-father.html