Wash all the produce. Cut zucchini in half lengthwise and cut each half into 8 pieces.
Peel carrots. Cut in half lengthwise and cut each half into 8 pieces.
Cut apples in half, remove seeds and stem. Cut each half into 8 pieces.
Add carrots and water into a large pot. Turn on high and cook 8 minutes, stirring occasionally.
Add zucchini and apples and cook another 3-5 minutes.
Pour everything into a blender, puree until smooth.
Pour into ice cube trays, allow to cool, wrap/cover, and freeze.
Thaw in the fridge the night before use, or thaw by putting the ice cube in a bowl over a bowl of hot water on the counter to defrost.