This is one of my favourite Fall themed art lessons- I teach it to my Grade 6 classes every year. It reviews one point perspective, and shows how to create a sense of depth by changing the size of pumpkins in a field (small, medium and large). I give students a choice to create either a 'typical' fall scene (scarecrow, pumpkin, barn, etc) or to create a more 'spooky' Halloween version.
I previously posted all the steps HERE.
We draw them in pencil first, outline in fine tip Sharpie, then colour however you want- we use marker watercolour and liquid watercolour for the sky.