Slice watermelon in half. Using spoon or melon baller, scoop out flesh of watermelon and set aside in bowl. 

Place watermelon flesh in blender or food processor and puree until watery mixture forms.  

Pour puree into silicone ice cube molds and place in freezer. Our watermelon puree filled 3 trays, each of which makes 21 cubes.

Freeze for 1 hour, remove molds from freezer, and sprinkle chia seeds on top of each cube to simulate watermelon seeds. 

Place molds back in freezer and leave overnight. To enjoy, add to a glass to infuse cocktails —or even a glass of water — with fresh watermelon flavor.