Slice the watermelon into small pieces.
Cut the oranges in halves. (Note: Before cutting the oranges, roll and crush them so that you can get more juice from them.)
Squeeze juice from the oranges and place it in a small bowl or glass.
Juice the watermelon using a juicer.
Mix the orange juice with the watermelon juice.
Put ice cubes and watermelon chunks in a tall glass.
Pour-in the prepared juice to the glass. Garnish with orange slices if desired.
Serve cold and enjoy your watermelon and orange juice!