Grip one lemon half firmly; press and twist onto lemon reamer until all juice is released. Repeat with remaining lemon halves. Discard empty halves. If necessary, strain juice through strainer to remove lemon seeds. You should have about 3/4 cup freshly squeezed lemon juice.
In a large jar or pitcher combine the freshly squeezed lemon juice, water, and sugar. Stir vigorously until sugar is just dissolved. Add assorted fruits. Ladle immediately into individual disposable cups filled with ice cubes, or chill several hours. Makes 6 cups.