Slush Punch

2 (6 ounce) cans frozen orange juice concentrate, thawed
2 (6 ounce) cans frozen lemonade concentrate, thawed
1/2 cup granulated sugar
3 (6 ounce) cans water
1 (46 ounce) can pineapple juice
3 (12 ounce) bottles cold ginger ale

Mix all ingredients except ginger ale together; stir well. Pour into an ice cream bucket; freeze.

To serve, thaw to a slush and add cold ginger ale.