"Textured Painting - Natures Paint Brushes" This is not just art, but art in nature! Go on a nature walk to gather 'schtuff!' Then use what you gather to create art or As art!
Using wire hanging baskets create a 'bug ball topiary tree' by wildlife gadgetman -- help attract beneficial insects.
Creating Wild Art: Forest Faces, Mud Monsters, whatever you want to call them! A cute nature craft to personalize your backyard.