We have a big fall party every year, and instead of carving pumpkins, we use nature to decorate them! Every one is so unique, and kids can easily work independently (no knives involved).
We use low-heat glue guns, sticks, moss, leaves, hay, berries, pinecones, flowers, pine boughs....
basically anything and everything we can find out in the woods!
We LOVE this tradition, and they welcome neighbors on our front porch all throughout the season!