You will need a watermelon, cutting board, spoon, and a long knife.
Step 1: Cut in Half
You will take the knife down the center of the watermelon and cut it until it is in two half pieces.
Step 2: Cubes
You will then cut the insides into squares. This will allow no mess. Make sure you do not cut into the outer part of the watermelon.
Step 3: Cleaning
You will use a spoon to clean the insides of the watermelon. It helps to start front the end. Once you get the square chunks you cut in the previous step, you will scrape it until your satisfied. While you are cleaning the insides, the you will be placing it in a large container.