Slice off the bottom of the watermelon to enable it to sit flat on a plate.
Using a knife carve a circle into the top of the watermelon, remove and keep aside as a lid.
Scoop out the insides of the watermelon and chop into pieces.
Carve a Halloween face into your watermelon.
Fill with the watermelon and pineapple chunks and allow to spill onto the plate.