Spiked Watermelon Balls

1/3 cup water
1/2 cup light rum
1/3 cup sugar
1/3 cup fresh squeezed lime juice
1 teaspoon grated lime peel
Bring the water to a boil. Stir in sugar and simmer for 5 minutes. Remove from the heat and allow to cool somewhat before adding the rum, lime juice and the grated lime peel. Cut melons into balls with a melon baller. Pour the syrup over the fruit, mix gently, cover and chill for several hours before serving