Last week I was given a large tub of 99% cured air dough with the vauge notion that I "can do it for something sculpturey..."

Well, After cutting out the soft inner core and soaking it in warm water for about half an hour, I had a roughly workable lump of slightly sticky papery pulp.
I made a rough hill shape and started pressing rocks into it too add some texture. A couple of days on the radiator and a quick paintjob later i have a very serviceable hill.



I'd recommend the material, It's cheap, non toxic, air drying, super light when dry, and retains alot of flexibility so you can just chuck your hills and rocks in a box without worry.