After they do that, then we have 2 children made out of flannel that they have to dress with flannel clothing for the weather. I hope some of these ideas help you. Point out trees and how they are changing. Collect leaves for art if appropriate. After reading one of any number of fall books I like to do leaf rubbings.
Place leaves on table with the vein side up.
Cover with the paper. Use a different leaf or just change position of paper and crayon color for another image. One children get the hang of it they can all be successful, I use it with my 4 year old class. Have children paint their choice of color on the leaf. After the leaf is painted to the child's satisfaction move the leaf to a clean spot, painted side up.