hedgehog fall leaf craft - I did this with my son's class and it was a total hit. I'd recommend using leaves that aren't brown yet, as the brown leaves are more brittle and hard for kids it work with.
Spray Painted Pine Cones- during the winter holidays I spray paint pine cones leaves and acorns gold and silver for the mantle and tree (small eye hook for ornament.
Toilet Paper Roll Bird Feeder: don't throw out those toilet paper rolls. Upcycle them into a bird feeder by covering in peanut butter and then rolling in bird seed!