When I student taught kindergarten the kids fingerpainted a pumpkin. When the pumpkins were dry they added a mouth, nose, and eyes. They turned out really cute. When I taught 2nd grade last year I did some fall centers. In one we made a fall wreath. I had the kids bring in some leaves and they glued them around a paper plate with the middle cut out and we glued on a raffia bow at the top. I also had kids arrange leaves between 2 pieces of waxed paper and I ironed the pieces together. They looked great! You could also use contact paper. You could also make a class scarecrow...have a parent donate some old clothes and another make a cross for the scarecrow to hang on. Maybe another parent could donate hay to stuff it with. Have the kids stuff it and make a face with a paper bag. I did this with my daughter at a fun day and it turned out really cute! What out for hay allergies though. Good luck! P.S. Isn't fall the best time of year!