Before you carve your pumpkin to take a picture of it. Then as
 each stage is cut, snap a picture. These are great for sequencing!!!

We have a pumpkin rolling contest outside on the playground.  Each child
takes a turn and rolls the pumpkin as hard as they can.  We measure the
distance and figure out why some pumpkins rolled better/worse than others.

Take children outside to collect as many leaves as they can find.  Go back and have
 children take turns putting the leaves into groups of small medium  and large leaves.

For math you could let the children decide how many patches the scarecrow
should have - how many buttons - etc  you could also graph their answers. 
Maybe  have several shirts to choose from and have them graph
 their preferences to see which one has the most votes. 

 I have a simple scarecrow pattern on the folder and the children either
 roll the die and place the appropriate number of buttons on the scarecrow
 or the appropriate number of crows on his  shoulder.  Once your scarecrow is
 done you could also make a list like "one  hat, two arms, three
 patches, etc  Let the children come up with each item.

With felt, cut out a tree and put a bunch of nuts at the bottom of your tree made out
 of felt. Make a squirrel at the bottom of the tree.  Make cards that say different numbers.
Let the children pick a card and then  put that many number of acorns from the
 tree in the squirrels mouth!  Great for learning counting and number recognition!

In the math center, have a balancing scale. The kids can "weighing" small gourds,
 pumpkins and ears of corn. Talk about which side has more and which side
 has less and why one side of the balance goes down and one side is up, etc