1Mix sugar and 1/2 cup water in 1-quart saucepan. Cook over medium heat, stirring once, until sugar is dissolved. Cool to room temperature.
2Mix cooled sugar syrup, the lemon juice and 3 1/2 cups water in 2-quart nonmetal pitcher. Place raspberries in strainer over small bowl to drain (do not press berries through strainer). Reserve berries for making ice cubes. Stir raspberry liquid into lemon mixture; refrigerate.
3Spoon raspberries evenly into 12 sections of ice-cube tray. Divide 3/4 cup water evenly among sections with raspberries. Freeze about 2 hours or until firm. Serve lemonade over ice cubes.