Peel and cube the mango and kiwi (if using fresh). Freeze the cubes for a colder smoothie. If you're using fresh mango and kiwi, peel and cube them. You can freeze these cubes beforehand for a cooler smoothie.
Then Peel (optional) and chop the carrot and apples into smaller pieces for easier blending.
In your blender, combine the mango cubes, chopped carrot, apples, orange juice, lime juice, kiwi cubes, and spinach leaves. Add 1 cup of water or substitute with ice for a chillier drink.
Blend everything at high speed until the mixture becomes smooth, which should take about 1-2 minutes. If your smoothie is too thick, add more water or orange juice gradually until you achieve your preferred consistency.
Taste the smoothie and adjust the flavor if needed, perhaps with a bit more lime juice for tartness or orange juice for sweetness.
Pour the smoothie into chilled glasses and, if you like, garnish with a slice of lime, kiwi, or a sprig of mint.