The base is from a mini Zen garden set, the sort they sell in bookshops.
The base is fimo (soft), prodded with a 3.5mm stereo jack and painted in acrylics. The bushes are standard model railway stuff.
This started out as 3 separate projects (use the base, dinosaurs and alien terrain) but pretty quickly merged into one. the Dino zen garden now sits on my desk.
More pics after the jump