Use a knife to poke a hole in the middle of one marshmallow.

Insert the spice drop into the center and try to fold the marshmallow around it so it completely surrounds the spice drop. (The spice drop is the inner core and the marshmallow is the outer core.) Set aside.

Find a grown-up to help you. Put the butter and the rest of the marshmallows in the bowl. Microwave on high for 1 minute. Be careful when you take it out — it's hot!

Stir with a spatula and microwave for another minute.

Stir in cereal and cool for at least 1 minute.

Wet your hands with water. Then roll the cereal mixture (or mantle) into a ball around the core. It might help to spread out the mixture, place the core in the center, and fold the mixture around it. Pack it tightly into a ball.

Put your edible Earth on a plate and chill in the freezer for about 15 minutes.

Take it out and pour the chocolate sauce over the ball. Make sure the chocolate covers the whole mantle. Let the ball sit for a minute until the chocolate hardens. You just made a thin, yummy crust!

Use a serrated knife to slice your Earth in half. Check out the layers of inner core, outer core, mantle, and crust.

Eat up!