Add all ingredients to a blender and blend until slushy.
Pour into a mason jar, add the lid, and place in the freezer until ready to serve.
When ready to serve, remove from the freezer, shake up, then take off the lid.
Serve with a spoon and straw for scooping and sipping.
I used 6 flavors in 6 colors to make 6 rainbow slushies. In the order of ROYGBV- Watermelon (red/pink) , Peach (orange), Mango (yellow), Green Apple (green), Blue Raspberry (blue), and Blueberry (purple).