1. Combine boiling water and JELL-O and mix until dissolved completely.
  2. Mix in lemon juice and juice/soda (if using Soda, it will fizz a bit).
  3. Pour into a baking dish and freeze for 3-4 hours, or until hard.
  4. Remove from freezer 5 min before serving and use a spoon or ice cream scoop to scrape the slushy out.
  5. Add a little more soda/juice to glass before serving.
  6. Enjoy!

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