Collect fallen leaves, varying shapes and sizes will add interest.
Paint on the leaf, the press the leaf paint side down to make a print. Repeat as many times as you like to create the any design you wish.
Try (if you like) to make a negative leaf. Use a rolled up piece of scotched tape to hold the leaf in place then dap your brush in one or more color, place it on the leaf and pull towards the edge. Repeat until you get around the outside of the leaf.
Let dry and display your beautiful artwork!