(Goblin is 32 months)
I love the work of Andy Goldsworthy. He is an artist who works with natural materials in their natural habitats to create non permanent pieces of art. And the art is quite incredible. You can search an entire catalogue of his work here but I actually find it easier to type his name into google images.
Goblin made his own Andy Goldsworthy style spiral.
The one on the left is Andy Goldsworthy and the one on the right is Goblin's.
(Yeah OK I probably didn't need to point that out did I!)