Cartoon Illustration of a clear Landscape cross-section (from grass to underground)

We're looking for a custom illustration/graphic to be produced which will be used as a background image. The final graphic is to be drawn/illustrated in a child-friendly cartoon / semi-realistic fashion, so fairly bold colours, friendly, vibrant, textured. We see the "landscape cross-section" as a graphic with levels or sections to it. These are as follows... - beginning with strands or blades of grass (like any other vector grass illustration you can find on the web), the actual strands can be provided or you can draw your own - these strands/blades will blend down to a more solid green area, textured with noise and sporadic grassy tufts - then changing to what is 'under' the grass (on the cross section). Meaning, the 'earth' or brown muddy darkness underneath, featuring strands of white grass 'roots' poking down from above on the underside of the 'turf' down beneath the surface into this darker brown colored area. - 2-3 layers or levels of 'underground' in an arc or cave-like shape, getting progressively darker on each level as the viewer gets 'deeper' underground to give a sense of depth - finally, some sort of earth/ground, leveling out, a solid muddy base to the cross-section. This section should just look like a nondescript, muddy/soil floor, the odd few stones or small rocks about and a little texture, bleeding away to the darkest shade of brown yet. Sketches and example-graphics can be provided for style/inspiration. We're just looking for someone to put this together digitally based on our sketch. Looking to give the go ahead this week and would like work to be complete before January 2015 (ideally, before Christmas) Any questions - please get in touch