I found these two pictures on Better Homes and Gardens. Sooo cute!
This first idea could be done with real pumpkins and fresh flowers. Or you could buy a pumpkin from the craft store and glue silk flowers onto it - then you could re-use it every year! Which is what I would do.
And this next picture is just so clever. Cinderella's coach - made out of junk and a pumpkin! How cute is that? This would be an adorable centerpiece for your dinner table.