This grown-up fruit dessert borrows flavors from margaritas. Tequila and Triple Sec infuse the watermelon slices, which also get a spray of lime juice and a sprinkling of coarse salt. The longer the watermelon soaks, the more flavorful it becomes -- one more reason to save any leftover slices.
After processing the watermelon, strawberries, lime juice, and ice, taste before adding sugar; you may not need any. For the star garnish, an adult can press a cookie cutter through the rind with the back of a wooden spoon.
Not every gelatin is meant to be completely firm. Halfway between a drink and a dessert, these loose-set watermelon treats include chunks of the fruit. If you like, top them with cubes of rose hip-hibiscus gelee flavored with fresh mint and basil. The bracing results combine seasonality and different textures sure to tempt any palate.