My 8 year old made this drawing, on our swingset picnic table , yesterday.  She drew the deer using a pencil, but the rest of it was colored in and drawn using nature.  She used lantana and smeared it around for the purple sky, tree bark for the brown deer and tree trunk and grass for the green in the tree and ground.  She just informed me that she also used some of her green smoothie (which had a ton of kale in it ) for part of the green.