Take my monster face pizzas. Pesto makes the green monster faces look scary. And because they're made with English muffins as the crust, these pizzas are easy enough for the kids to make themselves.
Or try my brain Jello mold. It looks disgusting, but actually tastes good. Serve it on Halloween night to really spook the kids.
Try all of these recipes, and be sure to post reviews.
Monster Face Pizza image by Stephanie Gallagher 2012, licensed to About.com Inc.