Puree watermelon in a food processor or blender until smooth

In a saucepan combine water and sugar, bring to a boil then simmer until sugar dissoves and mixture becomes clea, about 2 minutes.

Combine watermelon puree, lemon juice and salt in a large pitcher. Pour warm symple syrup over watermelon mixture and stir well. Chill until very cold, at least 2 hours. Serve in frosted chilled glasses over ice garnish with skewers of watermelon balls and lemon wedges

Place sugar in small bowl or plate. Rub the lemon slice around the rim of the glass to wet it. Dip glass rim in sugar to coat the rim. Chill glass until ready to fill