noun/adjective pizzas
One year I had my children make paper "noun pizzas." We brainstormed toppings they like on their pizza and then I had them glue the various shapes on to their pizza. (I had them already cut out--you can adapt as to the level of ability of your class). Then, after lessons on describing words (much like the other post), I gave the kids their pizzas back and asked them to describe each topping. (for example: stringy cheese, spicy pepperoni, green peppers, red sauce, round meatballs, etc.) They had great fun!
Also, similar to the other post, I had the children in four groups. Each group got a bag with a mystery food in it. They had to reach in and feel the food and write describing words without mentioning the food. Then, they read off their descriptions while the other groups tried to guess their food. I used things like cooked spaghetti, marshmallows, broccoli, etc.
Good luck! Have fun!