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.
Fall Sensory Table - with leaf people! The leaf people are adorable.
Painting a Q Tip Fall Tree. This would be a fun craft for Halloween / Fall Festival party. Could add pumpkins beneath the tree!