Cover the food table with a red and white checked tablecloth. Use small, aluminum pizza pans as plates. Make a centerpiece using a pizza pan, chef's hat, oven mitts, and wooden spoons. Put chef's hats on helium filled balloons. Later, the children can decorate their own pizza chef with markers. Make pizzas out of construction paper, and hang them around the party room. Make a sign for the front yard or front door that says "(Birthday child's name)'s Pizzeria" (i.e. Judy's Pizzeria). Ask your favorite pizza parlor if you can buy a few empty pizza boxes. Hang them on the wall around the party room.
Obviously, you're going to be serving pizza at this party! You can order a bunch of pies from your favorite local pizza place, or you can let the guests make their own. To have the guests make their own pizzas, buy some ready made, pre baked, individual sized pizza shells. Put out bowls with different toppings, meatballs, pepperoni, peppers, onions, etc. Give each child a scoop of sauce, and a small cup of cheese. Once they're done topping them, bake them off in your oven, and serve. Include other pizza parlor foods, like garlic knots, breadsticks and salad. Make the cake look like a pizza. Using yellow frosting, to look like cheese, ice a round cake. Use light brown frosting around the edges for crust, and add the toppings of your choice, peppers, pepperoni, meatballs, etc. Use different colored icing to make the different toppings. Red for the pepperoni, green for the peppers, white for the onions, etc.