Here's the order of Earth's layers from surface to center:

1. Crust: The thin, outermost layer of Earth, composed of solid rock. It's like the skin of an apple.

2. Mantle: The thickest layer, made of mostly solid rock but with a partially molten layer called the asthenosphere. It's like the fleshy part of the apple.

3. Outer Core: A liquid layer of iron and nickel. It's like the core of the apple, but in liquid form.

4. Inner Core: A solid ball of iron and nickel. It's like the seed of the apple, but extremely dense and hot.

Let me know if you'd like to know more about any of these layers!