What meals can you have in a happy meal?

A Happy Meal is a boxed meal for a child, from McDonald's. The box has games a child can play on it, and the meal also comes with a small toy. A Happy Meal comes with either a hamburger, cheeseburger, or a 4-piece order of Chicken McNuggets, a choice of small fries or Apple slices, and choice of milk, juice, or soda.