felt (various colors)
thread or hot glue gun
First make a template for each of the shapes you want. I made a pumpkin, candy corn, bat and ghost. If you don't want to freehand it, you can find many templates on the web.
Second cut out the shapes by tracing around your template with a pen. Make sure to cut two at a time so you have a front and back. Sew eyes on, then sew together, making sure to leave a 1 inch opening to stuff.