Add watermelon juice and/or chunks, fresh and frozen strawberries to blender, blend until smooth
Pour over yellow layers. Use spoon or straw to created swirled effect if desired.
Cara-Cara oranges are a small navel orange that is pink on the inside. If you can not find them; use pink grapefruit if you want a more tart flavor, more watermelon if you want a brighter pink, or regular oranges if you want the orange flavor and less pink color.