My favorite was this set of Stamped Cookie Cutters. They are a set of four cookie cutters, a flying witch, pumpkin, cat and skull (not too crazy about skull).
First, you use the nylon cutters to shape a flat cookie from rolled dough. Then gently press the spring-loaded stamp to add imprinted detail. Pressing harder creates a cutout surface. You can also sandwich a flat cookie and cutout cookie, with a filling of frosting or jam in between. Aren't these adorable?