The smoke of burning maple leaves - pure & simple
"Not everyone has your passion for dead leaves."
Jane Austen - Sense & Sensibility
Do you know what a leaf fort is? It's simply a huge pile of fallen leaves carefully raked up, on top of which a group of children sit defending the pile against another group. Battle is joined by gathering up armfuls of said leaves & pelting the opposing party until all concerned are worn out, have twigs in their hair, crumbled bits in their socks & underwear and all the leaves are once again thoroughly spread over the lawn where they belong in the first place.