First we gathered variously textured items around the house such as a wood laminate sheet, a bamboo mat, some plastic mesh used as veggie packaging, for example.
Next we made rubbings of the textures onto white paper. Then we cut out squares, rectangles, triangles and semi-circles, each of which we used to make up various sized and shaped buildings.
I also found some earlier work of Spuds [white crayon and blue water colour], which was perfectly textured for clouds. I managed to talk him into letting me cut it up.
We made a road, divider lines, and a patch of grass with 3 different colours of electrical tape.
Finally, we added a few flying creatures to top it off.