Here are three themes I did for the girls last week. Save for the blue rice, they loved them.
Ocean Theme -- Fish sticks, rice with cheese dolphin and green bean seaweed, Goldfish crackers, pepperoni "bubbles" and brownie "rocks"
Dog theme -- Dog shaped PB&J with cheese collar, Smores cereal "dog food", dog shaped marshmallows, cheese stick "dog bones" and a frozen yogurt "fetch stick"
Three Little Pigs theme -- Pig sandwich (opened faced Nutella sandwich), "Sticks" Wheat Thin Sticks, "Hay" Lo Mein noodles, "Bricks" cheese sticks, "Pig Trough" celery with peanut butter, and "Mud" brownie squares.
Notice the cute factor. Cute equals the kids eat it up. Except blue rice. Blue rice is too strange to eat, I've been told.