I have done this project with Year 3's to Year 7's - great way to teach blending and perspective. We first looked a quite a few photos of Uluru and talked about the variety of colours we could see.
Pencil in a horizon line and Uluru outline
Colour Uluru with oil pastels. Add outlines of blades of grass in the foreground.
Colour the foreground.
Paint the sky with blue ink......these look gorgeous when displayed!